Great sound quality, horrible fit.
594281
These earphones have great sound to them, but I have always had difficulty getting in ear phones to fit snugly and these are no exception.  For those who don't have that issue, these are a good buy.  For those like me, I'll be sticking with over the ear versions from now on.
1194389
To say that I have a few sets of headphones would be an understatement. I have tried a few sets of ultimate ears headphones, and think that they sounds really nice. A very full sound. Typically, you will get above average highs, mids and lows from them. These were no different straight out of the box. As I used them for a while, They did sound better.

My problem with these headphones is the fit in my ear. Depending on which tips I used, they were either too big or too small, or just wouldn't stay in, regardless,  I could never get a really good fit. As such, I never found them to be truly comfortable. Yet, the important thing about this, is while this did both me, they may fit someone else perfectly.

It really was a shame, becouse other then how they fit, I thought they were excellent headphones in this price class.

Note:
IF YOU NEED THEM TO WORK WITH A PHONE / IPHONE, LOOK FOR A SET OF HEADPHONES WITH A MIC AND END BUTTON.
2852976
These never worked properly for me.  I replaced them through JayBird, thinking my original pair was defective.  The replacement pair had the same problems, so I ended up returning them through Amazon.  The sound quality of these earbuds is EXCELLENT, far exceeding my expectations.  The fit is great, no complaints there.  The bluetooth connectivity is where I experienced trouble.  Paired with my iPhone 6, I could never maintain and consistent connection.  Music would constantly drop out and stutter, making these unusable and frustrating.  I hope the later versions have improved this.
4962047
This is a good quality headphone and the sound is nicely contained within the device, hardly any sound escapes--not like some cheap thin headphone housing with noise buzzing out from them.  Those are cheap earphones.  The better ones direct the sound into the ear chamber instead of renascenting ever which way out of the earphone.  The drawback is these headphones do not stay snug in your ears; you have to have perfect size ear holes to fit this earphone perfectly.  The sound quality is very good when I push the earphones against your ear to shut out the surrounding noise.  Still, dispite the ill fit, it still manages to send good sound to my eardrums.  If your ears do not fit this headset perfectly, like mine, you'll hear a 75% sound output; you have to turn up the volume to compensate the loose fit to output.  I wish they make this exact quality headset in the earbud or make an adaptor which give a more universal snug fit so we can hear the music/sound wach volume's full capacity.  Hey, Nokia how about some adaptive earbud sock to go over this headset/headphone so we can really enjoy this product's high potentials.  With the volume at max the sound is still clear and sharp--no background wire fuzzing.
3680096
These are Sennheiser headphones; they are expected to be made of quality components, and provide quality audio.  Sennheiser is generally known for those two things.

These cans are a major exception to the norm.  I'm not even sure where to begin...

The audio quality is absolutely *horrid*.  I'm comparing them to Sony MDR-7506, MDR-V6, and MDR-V600 phones, a US$30 "gaming" pair from Creative Labs (who normally makes horrible hardware), and high-end professional headphones like the Audio-Technica ATH-A900s.

The audio of the PC350 consists predominantly of treble and mid-range.  I hate excessive bass, but these cans have absolutely none.  Adjusting my soundcard settings to make up for it made no difference; it just ended up sounding compressed and washed-out.

The cord reminds me of the aforementioned Sony cans -- if you adjust it in any way, or it rubs up against something (your desk, arm, shirt, whatever), you'll hear it -- loudly -- in the left headphone.  And with an in-line adjuster that consists of complete and total plastic... do the math.

The phones and the padding area appear to be made for people with huge, abnormally-sized heads.  If you have such a head, these will fit you perfectly, and you'll probably appreciate them.  If you have a normally-sized head, you'll find the phones don't press up against your head enough (they're comfortable, but they could use a little more tension) -- putting my hands over them and pressing them against my head improved the audio significantly (but still no bass).  I could literally fit one of my fingers between the cushioning and my head -- imagine how that affects the quality of sound...

The packaging is an atrocity.  You're probably paying US$20 just for all the plastic, ties, and unnecessary plastic bags.  Even the in-line adjuster was wrapped with a plastic bag -- it's sealed, you fools!  The box reminds me of a Rubix product, taking a good 10 minutes to figure out.  I doubt any of the plastic used is recyclable either -- sad.

The only good thing is the microphone, which does sound clear and crisp as advertised.

In general, this product is just another example of marketing of garbage trinkets/gadgets towards younger generation gamers.  The higher price tag does not make these better.  If you want a good set of headphones, try Audio-Technica's ATH-A900 cans -- which lack a mic, of course.
290465
Despite the reviews that prompted me to buy these earbuds, I could not get them to fit properly or to fit in a way that I could hear any bass whatsoever. All I could hear was treble. So I returned them immediately. I do have a pair of Klipsch X10i earbuds that are my reference as well as KEF M200s. The X10i units are perfect but very expensive. The M200s were about twice the cost of the TTPOD T1-E earbuds and also have two drivers. They are quite good. I cannot recommend the TTPOD T1-E earbuds. Perhaps they are OK if you can get them to form a seal with your ears. I could not.
1001422
The sound quality is great but they don't fit in your ear well at all. I advise you buy earbud stabilizers from another company if you don't want to try shoving this into your ear canal.
229474
I was really excited to receive this product, however, when they came in I struggled to find a size that fit my ears.  I tried a variation of different earbud sizes and each stayed in my ear for a minute or two until I moved and then they fell out.  Everything else about the headphones are great; the sound, the look, the wireless aspect, they just don't fit to my ears. :/
3245345
Disappointed about the fit - just as other reviewers have described, the fit is both uncomfortable and requires an additional purchase of earphone tips to get right (Comply T-500 works).  The sound quality was great - top notch. I liked the additional mechanisms to control the excel cords.  The functionality left a bit to be desired around being able to skip songs using the attached controller.
2109992
Fantastic audio quality.  It really cant be stressed how great these sound!  Very well balanced open back headphones with great bass, and amazing positional audio for gaming.  That being said, I had to return mine, as they were incredibly uncomfortable to me.  The headband exerts a good deal of downforce, but what really did them in for me was the clamp.  All of the clamping force was focused right on the top of my jaw, I ended up with a headache for hours after i tried them for just an hour or two. If you are a fan of akg's, or you find this style of auto-adjusting headband comfortable, and are used to it, then these are likely great cans for you.  If not, you may want to consider your options.  Also be aware that the cable is non-removable.
4088430
Honest review: I was really looking forward to trying these headphones out but after 2 days I had to return these because they are unwearable for me and here's why: the sound quality is great and the headphones are well built however the major problem: The headphones hurt my ears after 10 minutes even with no sound. I believe it's because I have small ears and the pain is unbearable. After a couple songs I wanna take them off because of the pain.

5 stars for sound quality but personally I can't do on-ear headphones. I will save up more money and get the studio version.

To anyone who wants these online: I recommend going to an electronic store and trying them out in store before purchasing.
2288391
Ear buds are bigger that anticipated and I don't like the fit. But the reception/sound quality on these are great
942733
They sound great, but are ridiculously uncomfortable
3071740
Sound quality: Great! I could hear everything clear as a bell, if the tips fit.
Compatibility: Great! My phone synced right up with the headphones, and I was able to play my music no problem. At first I worried that sound might come out of both my phone and the headphones, but this was not the case thankfully.
Desgin: Great! I love that the creators kept in mind that for high-impact sports, there's a lot of jostling around, and so they tried to make use of the ear's natural shape to help hold the buds in.
Fit: Poor! I tried every way I could think of to make these babies fit, but to no avail. First problem, is that the instructions say to push the fan as far onto the bud as possible, which would require a very long ear canal. I could only barely put the fan on the bud to make it the appropriate distance to fit my tiny baby ears. The other part is the tips; I tried the buds with them on, and with them off, and the only way they actually fit into the canal was without the tip on there. I should note that for both the tips and the fans, I used only the smallest size, and they were still too big. Over the ear was no help either. Now, I could have stood the reduced sound quality (from the loose fit) and the instability of the buds themselves, if they had actually stayed in. But they didn't. No more than 10 minutes into my run and they slipped out.
Cost: Poor! For a product that is supposed to be this good, it's a little excessive. I'm a Mac user, so I understand paying top dollar for a product, but my machines last for years, and take a lot of abuse. Not to mention they are far more important than a recreational device I only use to keep from sharing my running music with the rest of the house. ;)

Bottom line: if you (like me), have very tiny ears/head, or suspect that you do, don't buy these, and don't buy buds at all. My next option will be over-the-head headphones, as I need something to use on the treadmill that will stay in place without smacking me around with a long, stupid cord.
1671674
Over the past few years, I have tried numerous brands of in-ear headphones, but have never found that right combination of fit and sound. When I saw the new Monster iSport Strive, I thought my problems would soon be over. Wrong.

First, the fit. The shape is kind of odd to begin with, perhaps in an effort to be ergonomic and follow the natural curvature of the ear canal. However, these never quite stayed comfortably in my ear. The upper fin was a nuisance at first, but I eventually did grow accustomed to it. But, the bottom portion of the ear piece was far too hard, meaning after just 15-20 minutes of use, my ears would be in pain. There are three different sized ear tips included here, but unlike Goldilocks, I could never find a size that was "just right." They were either unbearably tight, or incredibly loose.

I'm willing to overlook the size/fit of the earphones overall, as it's hard to make a product designed to fit everyone, just as long as they sound good. And this is where I was really disheartened. I've owned several Monster products in the past, all of which have been outstanding, but the sound on these was dismal at best. The iSport is plenty loud, but terribly balanced. There is no real definitive bass on the low end, and the treble is rather tinny. Adjusting my mp3 player's EQ levels did help a little, but not enough to override the poor quality.

The one positive aspect is the flat cables, which do help eliminate tangling. The cables are also fairly light, which makes it ideal for running or other cardio activities.

Sadly, I cannot recommend the Monster iSport in-ear headphones -- especially at this price point. I wish I had a better recommendation, but I have yet to really find a pair that work for me! Overall, a 2 out of 5.
4513889
Nice sound, great range, poor fitting.  Prone to slide completely off of head, if you are in the habit of being active around the house while using your headphones.  They may fit a bit better with a better set of foam ear pads, though I have yet to spring for them.  The biggest issue is the fading, hissing, static, and sudden squealing that happens if the input source goes silent.  Really annoying.
1708936
If you have a rather large head like me, these won't be very comfortable to wear. I used these for a few hours straight and found myself getting a headache around my jaw bone due to the pressure being put on my ears. And fully expanded, they did not quite reach down far enough to cover my ears. I ended up putting them on at an odd angle to get them to fit over my ears.

The fit is disappointing because I really like the sound quality and the Bluetooth connectivity to multiple devices worked extremely well.

If you have a Bose retail outlet nearby, I suggest going there first to try these on before buying them.