Not a $100 headset. Falls short.
347572
They have decent sound quality. Haven't had to make any calls yet.

Problems: the volume is too low, when I play my drumset, I start to lose track of the music I'm playing along to because its not loud enough.

The bluetooth range is terrible. I can be 10' line of sight from my phone and will start breaking up. Even in my opposite pants pocket from the button side of the headset it will start losing signal.
366158
I would like to love it. Unfortunately, the one I received was defective. The headset itself is made of good quality plastic. It doesn't look filmsy cheap like those $10-25 ones. It is very light weight and comfortable to wear for a long period of time if it fits yours. It doesn't fit my ear canals on regular wear.  I have to wear it upside down, left side on right ear and right side on left ear. it fits my ear canels that way. Sound quality is ok for its price range. Pairing is fast with Nexus 5x.  This is not the noise cancelling earbuds, not even a good noise isolation ones.
1257631
This headset has great sound quality, but other than that I am highly disappointed. The volume adjustment seems to be in a poor location so when I lean in my chair it often changes. But that is only a minor inconvenience, the problem is that I am a PC gamer who might spend 9 hours (on the most glorious free days) with the headset on. And it is SO uncomfortable. I don't think I have overly large ears, but the cushions on these are so shallow my ear rests against the inner part of the headset, and makes it unusably uncomfortable
3834505
This headset is not for hearing in-game audio - it is just for communication.

Although it is Bluetooth and will connect with smartphones, it will also not playback music. It is just for audio voice calls.

To me, it sounds muffled and I was not impressed with the audio quality.

The biggest deal breaker for me is the proprietary USB charging cable - if you lose this cable then you're basically screwed! A micro-USB would have made more sense!

The earpiece really is not adjustable at all - the hook does not bend like the microphone, so it's really not much of a support.

It comes with 3 different size earbuds.

Overall, I'm sorry, but I'm not impressed with this product. At least the price is fair.
4860917
I'll start with the pros.
Great voice quality, easy to set up and sits perfectly on my space starved desk.
I frequently work from home and those tedious phone conferences have become more bearable.

Now the cons.
1. No speaker, can't answer without the headset. Annoying when my wife and me try and have a conversation with friends.
2. Looks and feels like a cheap toy phone you would see at the dollar store.
3. Dial pad has no light, real pain when dialing in less than perfect light.

In all its definitely not worth the $90 something I shelled out. But I'll keep it.
4466456
See those headsets up there? Don't buy them. I walked into WalMart looking for a decent headset to use for my computer the other day, and these were the 'nicest' looking ones they had. They weren't the most expensive, but they certainly weren't the cheapest either. About a week or so ago I almost bought a much cheaper set made by Logitech, but decided to look at a few reviews first. Why I didn't do the same for this headset is beyond my knowledge.

I stood in the isle for quite a while, debating whether or not to purchase them at that moment or a later time, after reading a few reviews. I hate blind buying and very rarely do it. But for some reason the 'HP' part of the packaging seemed to reassure me that it'd be a good buy. I haven't heard too many negative things about Hewlett Packard, then again I really don't follow hardware reviews, something I should start doing after buying this...monstrosity.

Back home and finally getting a chance to try them out, I immediately realized that they were quite tight. I thought perhaps that I'd get use to it, but it isn't looking likely. I also noticed the volume control and how close it was to my chin. My previous headset's volume control was a good foot and a half/2 feet away from my chin. The HP Premium Stereo Headset's volume control, however, is a mere 3 inches away. And you don't even have the ability to turn the volume all the way down.

The cord itself isn't nearly as long as I'd like it to be, either.  From the volume control to the tips of the jacks I have a little over 4 feet to work with, giving me about 5 feet in total cord length. This is way too short for a headset, and I really wish it would've been stated on the box(something like that should be required in my opinion).

Like I said earlier, the headset itself if quite tight. This isn't a huge problem for those who don't wear glasses(but it may still be a bit uncomfortable). However, to those who do wear glasses(like me), it's a real bitch. It pinches the temples between your ears and head, creating an extremely uncomfortable feeling which pretty much requires you to take them off every now and then for a break. Then we have the sound quality, which is mediocre at best.

The microphone works, but the headphones seem muffled. Speaking of the microphone, did I mention the mute button? No? That's because it doesn't even work. Then again, I may have gotten a defective headset. The bottom line is simply avoid this headset at all costs. Definitely not worth the [...]+ I paid, the majority of which probably went into the collapsible design. You can fold up the ear pads and then fold the entire headset together, which is utterly useless to me since I'll never take the time to do such a thing. Even if I were to travel and brought them with me I'd simply wrap the cord around them, like I always do.

HP, how could you have ever approve of such a crap-tastic piece of hardware?

Update: 3+ months later, and I guess I have gotten use to the tight fit.  Everything else, however, still stands.

UPDATE 2: 1 year later and they have broken in the middle.
3278812
Pros: Wireless,  Good sound.

Cons: ear cups are tight and Uncomfortable,  horrible mic monitoring, and overpriced.

In short,  I'd recommend a cheaper wired headset. You'll  get better mic monitoring, more comfortability,  and pay half the price.
4611390
The Nokia BH 905i is a decent set of bluetooth headphones with good performance, but several issues that make them not worth the price.

NOTE: These headphones are much smaller than they appear in pictures. As far as bluetooth goes, they have clear sound and decent bass with the booster. Bluetooth audio quality is NOT on par with wired, no matter what anyone says. You will hear a difference. I am simply a causal listener, and I did. Of course it is a trade off to be able to walk around your house. Range is one of the strong points of these headphones. I was able to leave my phone downstairs on the couch and walk upstairs into a different room with no audio degradation. Unfortunately, I cannot say the same for noise canceling. It's performance is mediocre, and not on the level of the Bose QC15. This is partly due to the fact that they are not over-ear headphones, but also because they produce a disconcerting effect when ANC is on. I can only liken it to a high pitched, barely audible static warbling that becomes very annoying very quickly. These would not work for me on a flight for this reason. My ears are not very sensitive to these things, so you will likely pick up on this too. The BH905i is very comfortably to wear, but is not very secure on your head. I got them to be able to walk around the house an work on various things, but if I look down they start to slip off. Not good. I don't plan on using these for making calls, so I won't comment on that feature.

After using these headphones for a couple of days, I have decided I will be returning them. They do many things well:

Audio Quality (for Bluetooth)
Bluetooth Range
Ease of pairing (iPhone 3Gs)
Comfort
Lightweight, portable, good carrying case

But fall short in:

Secure fit
Active Noise Canceling
Audio quality (for $300 headphones)
No included Bluetooth adapter for non BT devices

The simple fact is, they are not worth $300 to me. Audio quality is comparable to a pair of Sonys that I got for 50 bucks. Bluetooth technology is just not there yet. Their high price comes from the fact they pack so much technology into such a small package. But that technology has its limitations, and I can only justify spending $300 on a pair of headphones if they do everything excellently. If you are comparing these with the Bose QC15s, go with Bose. They may not be bluetooth, but where are you walking around to on a plane? If you are comparing them to the Beats by Dr. Dre, go with the Doctor. Audio quality and immersion from Dr. Dre blows these out of the water. The only people I would recommend these to are those who like to walk around a large office in circles, make calls but to music in between those calls. Kind of a limited market, don't you think?  Sorry Nokia, It's not you, its the technology. Maybe next time...
197641
I purchased this headset for my desktop PC for games and listen to music.  sound quality is OK , but i was expecting more comfort then i am getting. They don't stay where i place them on my head and bothers my ears after about 30 min. Also the volume seems low.

I can not recommend this headset.
3450690
I agree with other comments.  Noise cancelling feature seems overrated.  Headset speakers sounded good on conference call but the sound had a 'booming bass' quality when I made a phone call (using skype for business).  I like the folding design but sound quality is not worth the 'premium' price.
4232346
This headset it just barely worth the $10.00 I paid. All-in-all, just shell out the extra $10 for this guy: [...]~This guys lasted me a year before it wouldn't hold charge and i got frequent use out of it (both on ps3 & iphone 3g/4s.)

Moving on...

PRESENTATION

  This headset is quaint to say the least and discreet to put it yet another way. Upon opening the packaging I was sad to read that the directions are geared exclusively to cell phone use (understandably), though even to that end -- the instructions lack depth and direction.
  Now, I would feel bad not mentioning that it seems to me that, if you were a person with small ears (meaning you would have even smaller ear canals), this earpiece may be a little big for you. I consider myself to have slightly smaller ears and the head set feels big in my ear HOWEVER -- I did a rapid head shake test and the thing stayed in place!

SYNCING

  The headset itself took me about ten minutes to pair after I decided (having followed the instructions various times in various order) to just hold down the darn on/off button in hope that...success -- YOU NEED TO HOLD THE ON/OFF BUTTON DOWN UNTIL THE LIGHT IS SOLID BLUE.
  After that, I had to problem pairing the headset to both the PS3 and iPhone, respectively.

USAGE (including battery)

  The headset charged pretty quickly (I'd estimate around half an hour at most, but don't quote me.)
  Syncing it to the PS3, I was excited to see what it sounded like. The results were disconcerting. I found myself unable to clearly hear myself and that there seemed to be some echo. With that, I took to the iPhone for a crash test.

Calling a friend I noticed the sound clarity had improved, however, I realize now that if I were in a noisy surrounding that I probably wouldn't be able to hear the person on the other line.

When my friend answered I told him: "Hey, I'm trying out my new headset, can you hear me?"

To which he responded, "...huh?!"

After that initial hiccup, he seemed to have no problem hearing me, save a few isolated incidents that were probably caused by my habitual mumble.

VERDICT

If you absolutely wanna be cheap (like I was) knowing full well when and where you'll use this product, than I say go for it -- IT ISN'T BAD BY ANY MEANS. If, however, you're looking for something with (dare I say it?) balls, well -- this product probably isn't for you and I'll again refer you to my previous ear piece:

[...]

Cheers!
3522384
Pros:
Over the head
Boom microphone
Combined mic/headphone in a single 3.5mm headphone jack

Cons:
Sound quality mediocre
Mic quality mediocre
Comfort is lacking

Overall:
For the price, I can deal with the Cons, but if you're looking for a headset you'll be 100% satisfied with, keep looking.
550368
Sorry,

But these headphones miss the mark for audio quality.  You expect when you pay close to $300, that the audio quality should blow you away....but they fall way short.  I feel sorry for people that fall for the hype...because that's all they are is hype.  If you want absolute quality and build of a good headset, go and get a  Sennheiser PC 363D......they are worth your hard earned money.
2000561
Mic shorted out less than a year into my purchase. The sound is good but the two volume wheels on the headset don't play well with Xbox. One should control chat and one game volume, but instead the chat volume also has game volume on the same wheel. The headset also has a very noticeable delay between the actual game sound and the sound coming through the headset. If you use both volume wheels, you get an "echo chamber" effect since one is delayed and one is not. The best game sound is available on the game volume wheel but if you plan to use voice chat you have to give up high quality sound for subpar when you need to hear your party chat. I regret buying this. Go with something well known like Turtle Beach, don't get burnt by these cheap knock-off brands.
2619187
I really wanted to like this headset, but just opening the box was an experience.  I'll bet 15% of the total cost comes from the large aluminum and plexiglass case (the enclosure is 4 x 8 x 4 for a headseat that isn't 1" long, come on!).  It took me forever just to figure out how to open that fancy case (turn a plastic clip at the top hidden under the retail hanger).  Okay, got this fancy box for this headset...now what do I do with the case?  Put my classic matchbox collection in it and make a shadowbox on the wall?

Anyway, enough dogging them about the useless, over the top case.  This headset was to replace an older Motorola headset and to pair with a new Droid X (another story for another time).  This one is about half the size with buttons also half the size.  That was problem number one.  I had to keep fiddling to find the button.  It is recessed on the headset and is very small, so you have to know exactly where to push.  I ended up pressing too hard or pressing on the edge and causing double and triple commands locking up my phone.

Pairing it to my phone was very easy.  It walked me through the process and connected immediately.  It also announces when you are connected or not connected to the phone (almost to a point it is annoying).  I found sound quality muffled compared to my old Motorola headset and again, volume controls are so small, they are hard to find on the headset.

I like over the ear headsets and I found this quite comfortable; however, if you don't have the device pointed the right direction, it will not pick up the voice commands correctly.  I had to look to check it was pointed toward my mouth and not up or down.  Since the mic is so small, there is no way to 'feel' that the headset is pointed in the right direction.

Overall, I am not impressed.  They seem to have spent more time creating this insane case and not focusing on the basics for a headset.  I know small is better, but there are limitations when you are blindly reaching for buttons on your ear.  Maybe my headset is out there somewhere...maybe I will find it when I find the perfect smart phone (sorry Droid, you didn't make the cut with poor Exchange features and crazy voice dailing)...ah to dream....  :)
3269654
Updated 11/19/2016:
I changed my review from two stars to one star. I bought a pair of Sennheiser Bluetooth headphones for about half the price of this unit after looking for more wireless alternatives. After using these for several weeks, I can say with confidence that this headset is pure garbage. I know you are thinking about it with all the hyped up paid reviews they set up, but go with a different brand. You'll save money, and probably get better equipment as well.

Removable batteries are nicest part of this product. The audio quality is not good for something at this price range. There are cheaper stereo Bluetooth headsets that have better audio quality, and the same can be said for wireless headphones from other vendors on the market if you don't need a microphone. Certain parts of audio are dull or muted coming from the headset, this works OK for voice but I have listened to $40 headphones that have better sound reproduction.

The headset is really tight fitting out of the box, and headset construction itself feels really cheap and fragile. This compounds the tight fitting problem because it feels like you will break them when you try to adjust the size. I had a few issues with the software as well. My regular headphones give a better surround experience with software Dolby Atmos emulation than what is delivered through this headset (think games like Overwatch). I can clearly tell where people/fire/etc. is coming from using my headphones, but with this headset the environment sounds jumbled together so it is harder to get a good fix on where stuff is really coming from. There is also very low volume range on the headset, almost like there isn't enough power to drive the speakers correctly.

I bought these from all the good reviews given on the web for this product and they must have built a special version of these for reviewers (or paid for good reviews) because the quality is just not there for the price they are asking. I was hopeful because according to these reviews they had everything I was looking for, wireless, Bluetooth, rechargeable/swappable batteries, great audio, and a microphone. Looks like I will have to keep searching.
3354233
Not comfortable and controls are hard to feel on the headset.