Great sound, poor build quality
932637
I purchased this speaker for my daughter to use with her iphone.  I was a little concerned about how loudly/clearly it would play considering its' tiny size, but once we paired it up ans started playing music I was seriously impressed. The sound was very impressive and full-range.

Unfortunately the soft touch buttons on the player just didn't work. No matter how lightly or heavily I pressed there was no response 99 times out of 100. When a button did work it was only intermittently. I wound up returning it, and since I didn't trust that even if the buttons worked on the next one they might crap out at any time I got an Oontz Angle Plus instead.

Pros: Amazing sound for such a small form factor
  Simple set up

Cons: Buttons didn't work right out of the box
4370928
I really enjoyed these headphones in terms of sound quality and comfort.  They even fold up nicely to fit in your pocket.  Unfortunately, they are made of an exceptionally cheap plastic and broke within 6 weeks.  I can't figure out how to get a refund, so I kind of feel like I paid $50 to rent cool headphones for a month and a half.
2000320
I have bought 4 pairs of these, the sound is amazing.

BUT....

They literally break every 6-12 months like clockwork. The wire eventually pulls out from one of the two headphone ear pieces every time. Gonna try the PortaPro to see if those hold up better.
578171
I love the way these buds sound, especially for the price (when I bought them they were $200.)  However, the cable keeps flaking out after a couple of weeks.  One channel will cut out unless the cable is placed in a very specific position, which makes them unusable for portable use.  I've replaced them four times directly through HiFIMan, and each set ends up having the same problem.  I will say that HiFiMan is responsive and accommodating, but I have to give up now and move on to a more durable set of buds.
2724237
This speaker is phenomena, the sound quality is far ahead of anything else I have used. It's perfect, the sound is crisp but not too bright. The bass is low but not muffled, and the volume is perfect even with the built in AMP turned off.

Everything about this pillow speaker is great, except the wire. My wire going into the speaker itself broke...I am very disappointed right now. It didn't even last a full four month, and I reply on this speaker A LOT! I tried to find some kind of support from Sangean but their support page only talks about their Radios. That does't really help me.

But overall this speaker is excellent and hopefully if I do get some kind of support and a replacement it will last longer!

Design 9/10
Sound Quality 10/10
Build Quality 7/10
Customer support 5/10
4610783
The sound is stellar from these earbuds and they fit fairly well straight out of the box. If you take the time to find and attach the right adjustment pieces for your ears they fit very well. You can clip the middle-back of the cord to the back of your t-shirt and jostle from running is all but eliminated.

HOWEVER, the right earbud went out last night. There's no sound from the right side anymore at all. Since I hadn't dropped them or yanked them or anything of that sort I can only guess the sound emitter inside the earbud went out. Judging from the other reviews, this isn't common and I just got an unlucky pair, but I have to review from my experience and that is a 2 out of 5 for one month of impressive functionality.

Unfortunately, I am just days on the outside of the return date so I cannot return them to get a replacement pair.
482888
Sound quality is awesome, no doubt about that. But the build quality is not so great. Not sure if it will last long. Definitely worth the money...
306464
After 3 months of living in my backpack the headphones are finally trash... While they sounded great for the price the quality just isn't there. The headphones can bump some major bass and sound excellent along with the fact that they are pretty straight forward in use and not very clunky but they can not stand up to everyday use. If you are looking for a short term solution with great sound quality I 100% recommend these but if you want long term high quality headphones I suggest you look on.
1585717
Sounds great. Better than most earbuds at this price range. However, after only a month of use while at work, the left side has gone out almost completely. This is a recurring defect I've found in the Xiaomi brand earbuds. I love their sound, but can't put up with another pair going out. This is my third set (two pairs of Piston II, one pair of Piston III). I can't recommend these.
3932348
Great sound and quality but will no longer hold a charge
3036092
I got my first pair in-store at an airport. On my flight afterwards I realized that one of the buds on the brand new headphones wasn't working. So, I exchanged them for a new pair at no charge. These worked great! The sound isolation was amazing and the style was sleek and minimalist. I loved my headphones! That was until the cord just above the headphone jack tore. Because of the weak connection to the wire and input, the rubber casing tore. I tired to cover up the exposure, but within the week the wires inside split and my incredible headphones were kaput. I have to mention that this happened after only a month of once daily use (at the most). While these headphones worked great, they did not last. I recommend investing in more durable headphones, these contain a design flaw.
4276417
While the sound quality of these is great for the price, the build quality is awful. After initially ordering a pair of 6x4s and returning them because one was bad right out the box, I stupidly ordered some 6.5s, again based on reviews and price. Well, one was bad. AGAIN! Straight out the box. Need to work on their quality control at the manufacturer. The many positive reviews are half right; the sound quality is great--if your into mono.
432787
My first impressions of the headphones were initially great. At this price point, the quality of the headband cushion and ear cups blew me away. The leather ear cups are extremely soft and provide just the right amount of cushion. I really enjoyed the sound quality as well. The lows weren't overpowering and the highs sounded clear and concise. Depending on what songs you're listening too, the mids can get a little muddy. Overall a solid pair of headphones considering the price.

Why the 1 Star?
The Build Quality: Aside from how comfortable these headphones are, the quality of the plastic featured on the headphones is very cheap. The headphones must be folded in a certain way in order to fit into it's hard shelled case. While I was packing the headphones away, I twisted the left ear cup in the wrong direction and with barely any resistance the plastic connecting the headband to the ear cup shattered. The plastic connectors are completely shattered and I don't think I'll be able to repair them on my own. Such a shame, I loved using these headphones and to have this happen was extremely disappointing.
125175
The sound quality of the headphones are great. Problem is the headphone jack detached from the port. Poorly constructed in my opinion.
3841557
I really want to give this product a higher rating, because these were one of the best earbuds i have ever owned. The sound is crisp and the bass is much better than any skullcandy ear buds I've used. I liked how you could customize the 'sound' with the caps and the tangle free cord (while not always tangle free) was nice.

Unfortunately, after using these ear buds for a whopping two days (not even two full day. Probably around 1.5, maybe even 1) the music coming from the left ear bud dropped in volume. And I was ok, well this is weird. Stopped using them for about 5 minutes and suddenly the volume was back? It's been fluctuating since then, and it gets a bit irritating.
3579858
I was very impressed when I first plugged these in my iPod.  The sound was great and they were much more comfortable than the headphones that came with the iPod.  One big hitch - the cord is very thin and made of a sticky material.  Within a week I had 3 places where the insulation had torn and the wires were showing.  I have them now in for warranty replacement but, really in less than a month these were completely unuseable after average use (they were stored in a separate bag from other items that might have damaged them but they tore anyway).  The extension is too long but I rectified this with a cord wrapper product by sumajin (found on iPod lounge).  If you are looking to throw your money away this is the product for you, otherwise look for something else.

PS - for those confused by the cord design, one side is longer than the other so you can drape the cord behind your head.
1527035
The sound is great (very clear, the bassline is natural), noise reduction is perfect, very comfortable. I tried a few brands but this one is the best so far for the price! I used them for every day and running\exercising (they don't fall out). Why the 3* you ask? Well, today my SECOND pair is going to the bin. The ear buds extremely fragile and brake very easily. The first pair made it to 4 months and then the left earbud stopped working. The second pair held it for 3 months then the right bud just fell off!