Great sound, comfortable fit and aesthetically pleasing
934404
Great sound, comfortable fit and aesthetically pleasing, all for a good price. What more could you need in a pair of ear buds?
110032
I just purchased my second pair of these, as my old ones finally started shorting out (after a few years of daily use). The angled jack helps with strain relief, which I imagine contributes to these buds' longevity. I also like the way they fit in my ears-- very comfortable, and I get a good seal for ambient noise suppression (and since they come with a few different sizes of rubber tips, you should be able to find something that works for you too).

As for the actual sound: I love it. I'm not an expert, but the music I listen to (classical, choral, folk, rock) all sounds great. The bass is very present, which makes for nice depth. In my opinion, the overall mix is really balanced. And come on... these are earbuds, and $15 at that. I really think these are an amazing deal.
4249681
OK these are very nice for the price! Music is clear and precise, there's not a lot of bass, but what there is sounds really good. I didn't bother to examine all the buds that are included to try and find the best fit, however the ones that are on as standard are comfortable and the angled design seems to be a quicker and better fit than other similar styles I've tried in the past. I've only worn them for a short time so far so can't comment on comfort for extended listening.

The packaging is nice, and to have a little case and Prime shipping included (again for the extremely attractive price) is all icing on the cake.

Highly recommended.
2843389
Comfortable, good sound, easy-to-use volume controls.
3318642
made well, sound great, good price, look cool
1974473
The sound quality of the MS 100 BAs is fantastic in the higher ranges, if one is accustomed to or desires deep-felt lows these may not be the right buds for you, but as a whole I've been deeply impressed with the crisp and clean sound that the Phiaton's offer. If I have a knock, and this is one in which personal anatomy and preference is going to vary wildly, it's that I don't find them particularly comfortable. The domed buds that 'best' fit end up feeling a bit like ear plugs that one might use for swimming, there's a little too much pressure for my taste. The next size down, for me, weren't secure enough to stay in during any substantial activity. I'm more apt to complain about my ear canals on that front than I am the buds themselves, because I like the design and for a brief period liked the fit and feel, it was extended use that became somewhat uncomfortable in the sense that I was just too acutely aware of their presence in my ears.

The cords are fantastic, they don't tangle, they feel and look good. Couldn't be happier about the engineering and design there. I used the microphone on a number of calls and at no point did anyone complain about my voice sounding distant or unclear, indeed my wife noted at one point that she felt she was hearing me better than she would when I'd use the mic on my Beats.
3588207
Im a bit older than Mr. Bolt, so I use headphones mostly for brisk outdoor walking. Ive tried a good number of the better ear buds  Bose, Klipsch, Shure  and I was eager to see how the Gibson Trainer TH100/27 compared.

First  the Gibson sound is excellent, certainly a noticeable step up from the ear buds Ive used. Im very pleased with their clarity, tone and detail.

Once set up, the Bluetooth feature is also wonderful  so nice to avoid tangled cords (where do those knots come from?!?!) or cords that sometimes get in your way working out.  Its got great range too  I turn on my iPad, leave it on a table and listen to music all over the house.

The headphones look great  stylish and subtle.  Pairing with a device is fairly straightforward. The controls are understated, though, and I had a bit of a learning curve before I became completely comfortable using them. Theres an indicated left/right alignment, which you should use to remember control placement. I found I took off the headphones at first to search for controls.

One minor note  theres an LED nightnav blinking light for safety. But I always walk facing traffic and, when used per the manufacturers recommendation, the light shines to your rear. Would have been nice to have the light visible both ways.

There's also an Activating Safe Sound mode for safety, which basically turns down the intensity of the music. Frankly, I never use it. The sound difference is noticeable, but I still don't trust headphones on the street at any reasonable volume to pick up all ambient noise. Gotta use your eyes and constantly look around!

Ive used the headphones for about 4 weeks and they are holding up well to perspiration (unlike some expensive ear buds I've purchased).

I guess my only significant complaint with the Gibson Trainer is the fit. In short, they're a bit tight for me. (I wear a large cap). The plus is that they do stay securely on your head, but the flip side is a loss in comfort. To compound the fit issue, the ear pieces have minimal padding. One other wear issue  the headphones bow out from the head just above the ears, making it hard to keep a baseball cap securely on while active.
938000
I picked these up to have a good pair of IEMs to wear to the gym and at home. I also have a set of Brainwaves ProAlphas and Sennheiser HD280s headphones that I would be comparing the sound to.
Sound:
I've let these break in for a week before comparing them critically to my other IEMs and headphones. After that time the bass is tight, but a hair lacking. The highs are pronounced and detailed, with the mids filling out the rest of the tone. I hope they will relax and get warmer after I've used them more. As with most IEMs, the tips can have a major impact on what you are hearing. The clear silicon tips that came with them worked better for me than the Comply foam tips that I use with my Brainwaves. Where these really shine is the details these IEMs bring out in the music and wide sound stage. When listening to a 24\96 .wav file I can hear a full range from my left to my right, creating an immersive experience.
Construction:
The feel well build. I like the flexible, yet reinforced 1/8" jack arm and cloth covered cable. The covering keeps these IEMs from getting too tangled up, a real problem I have with the Brainwaves. The drivers themselves are light and sleek, although the protection on the cables going up into them is a little on the light side. When wearing them straight down I get some microphonics through the cable, especially when running. This goes away if you wear them over the ear. They don't have an inline control or mic, but I never use any of that, so it doesn't bother me.
Packaging:
The little box HiFiMan ships these in is nice. Older reviews of the RE-400s say they don't come with many tips or a case, but that must have changed. They came with a few different sizes of black or clear silicon tips, an alligator clip, and a case. Simple, yet included everything you need.

Highs- for $50 these are nice sounding IEMs. I really like the sound stage and construction. Very comfortable.
Lows- Right now they are a little sterile. Listeners that want big thunderous bass would be disappointed.
Bottom Line- I really like the details these bring out in my music. I listen to FLACs ripped from CDs or HiDef .wav files that I've purchased, because I enjoy the experience of listening to music. These IEMs do my music justice. I can't say that they will replace my Brainwaves as my go-to for general listening, but they are better at presenting nuances in music.
2990080
I am about to order an extra pair of these earphones to replace another set of the crummy ones packaged with a new iPod.  I have happily used my current pair of d-JAYS (chosen based on an iLounge review) for a couple of years -- not only is the sound excellent but the in-ear fit is great.  I can wear them for very comfortably for long stretches.  The ambient noise-canceling aspect is good -- nowhere as complete as with my battery-powered Sennheisers -- though certainly in line with my expectations.  All in all, I love these little guys.
3063003
Great fit,  great sound,  great house cancellation  I'm officially impressive
1225848
These headphones are my favorite pair so far. I'm not an audiophile so I cant tell the slight differences between different types of headphones, but I can clearly tell these sound better than most of the previous pairs, and they were much cheaper. I also enjoy the looks of them
2135116
These earbuds, small as they are, offer exceptional bass, as well as comfort and attractive aesthetics! I've been a long time supporter of Sentey and I love what they're doing in the tech market: offering a plethora of high quality technology at bargain prices. These in ear earbuds are no exception. The packaging came minimal, but nonetheless eye catching. The earbuds are truly quite good looking. The sleek, tapered look of the earbuds combined with the metallic black finish and chrome adds to a truly premium experience. The earbuds come with a total of 3 sets of different sized earbud replacements, so you can definitely find a fit that works for you. Once you find it, you'll never want to take these out. They're so comfortable, and not just that, they sound so great. The bass is punchy beyond belief at this price point, and the highs and mids sound clear and defined. The noise isolation is also quite decent, and I can hardly hear someone talking to me even from just 3 feet away. The earbuds also come with a remote and mic, adding on the go capabilities. The remote is a one button, pause play/voice control remote and is very clicky and tactile; quite fun to press. As usual, Sentey does not disappoint! Can't go wrong with these for just $20 or so.

I received this product at a discounted price in exchange for an honest review.
1664531
I came to these headphones from the Klipsch Image X5, as well as Ultimate Ears Studio 3. My ears are somewhat difficult to fit comfortably with in-ear headphones, but the size/sound isolation aspects of them are too good to ignore for me. The x7i's are quite comfortable in ear, hours can pass without any fatigue or pain. Bass is quite good for an in-ear headphone, and the rest of the music is detailed as well. I'll leave more detailed audio explanations for the true audiophiles, but I am quite pleased with the sound quality. Other interesting aspects of the headphones are that the ceramic bodies are somewhat heavy, but in a substantial way, implying quality more than heft for heft's sake. In the same way, the flat headphone cord is somewhat heavy, which seems to contribute to the cable microphonics, but gives me hope for long term durability, especially given the cost of the headphones. I am less pleased with the straight headphone jack, as it worries me with how I keep my iPod in my pocket, but I've had truly excellent interactions with Klipsch customer support, so that calms the nerves a bit.
2550594
I like these earphones a lot. They fit very comfortably in my ears. The small ports on the earphone bodies help prevent pressure from building up inside my ear, which improves long-term wear comfort.

Prior to use I gave them a couple days of burn-in with some Pink Noise. The result is that I am very happy with the sound these produce. They are biased a bit to the lower-end frequencies, which is fine for listening to heavier, bass/guitar oriented music I generally prefer.

Service was excellent. I ordered these from the Monoprice seller on the Monday night before July 4th. They estimated I wouldn't receive the earphones until the following Monday or Tuesday, but I was happily surprised to find them in my mailbox on Friday.
1810000
OK, if you want great sound quality which is always the #1 factor I look for in headphones then these things are it.  Srsly clear with good lows and highs.  The fit of the earbuds is comfortable even after a couple hour's wear.  The cord is sturdy and has a clip that allows for easy storage so it doesn't tangle. Solid construction, I've dropped this many times already and it still sounds and feels great.

A few minor drawbacks keep this from getting 5 stars.  The estimated 5 hour listen time is really closer to 4 so if you are hoping for longer time then move on.  Initial connection can be a little tricky but I've never had to try more than 3x.  My experience shows the range is closer to 20' not 32' even when in direct line of sight, though within my apartment there was no loss of quality or signal even through 2 walls and a shut door at ~ 15 feet.  If you drop out, this will not reconnect correctly and requires a reconnect. When listening to any music on my Macbook Air, whether iTunes Pandora or whatever, if I pause the music then restart the headphones can't seem to keep a signal just like when I've gone out of and into the range limit.  I have to either stop then restart the program or disconnect and reconnect the bluetooth on the Mac it to get it to reconnect.  I also find that the cord, while sturdy, can be annoying if worn behind the neck when wearing a collared shirt or hoodie.

UPDATE 07/27/2012 - Have had these now for 3 months.  Functionally, everything is still the same but I am less happy with the fit.  As long as I am sitting still, they fit in my ears fine.  If I am moving about tho forget it.  I have to adjust them all the time.
3540659
My main styles of music that I like are acoustic guitar (Andy McKee, etc), CCM as well as some rock and alternative.  I took these headphones through the paces on many of these different style and really liked what I heard.  Sound is nice and balanced with no overpowering bass.  Highs were clean and the mids were well defined; there was no muddiness.

The design is super sleek with the high gloss finish and clean, crisp lines.  Its almost as if they designed the headphones to look as good as they sound.  The sides fold in and everything fits into an included carry case.  Not super compact due to the cushioned earpieces, but small enough to toss in a duffle or backpack.

The earpieces were pretty comfortable, but probably not something I would wear for many hours just due to the fact that they rest on your ears, not over you ears.  Related to the earpiece design is the noise isolation.  I did not find them to be strictly "noise isolating", but they did cut out a fair amount.  Pressing them to my ears to get them to conform to the shape of my ears helped out a little too.  So, not a perfect earpiece, but still very nice and comfortable enough for relaxing or zoning out on that plane flight.

I was provided these for my unbiased opinion and I will say that they are an overall nice set of headphones.  If you need strict noise isolation, you'll probably want to look for a more expensive, bulkier over-the-ear design.
3314564
From the moment I put these on I was in love with the sound!  I am a budding audiophile so I will admit that I have not had a chance to audition these next to the HD 650s, Grados or any of the other super-high-end cans that people often compare these to  so I cannot offer any guidance as far as how these may be better or worse than any of those.

What I can say is that compared to my Bose AE2 headphones, my Shure earbuds or the stock Apple headphones the soundstage on these is amazing.  The first thing I noticed when I put these on is that music had a warmer sound and I felt more like I was sitting in a room filled with music rather than just like my head was filled with music).  I have a feeling that the open back design really makes a difference because it does not reflect the sound waves coming off the back of the cones off the back and into the ear.  It does not have the punchy bass of the Bose headphones - so I will admit that music that is meant to be bass heavy will not get the boost from these that classic rock and piano and guitar jazz do.  I have found these headphones to be very comfortable.  They have a heft that suggests they are well made and durable but they still feel like on your head and the pressure and padding are just right.  Also, and maybe this is also due to the open back design, my ears don't feel as warm after several hours of continuous wear.

As for my equipment I am hooking these up to a 2012 iMac using B&W MM-1's as my DAC/Amp and playing music from iTunes.  The source material is a mix of Apple Lossless and high nitrate AAC and MP3 files. -- I should point out these are 300Ohm cans so they do take more power to run.  I have to turn the volume up a lot more on the MM-1s and in iTunes than I would ever do to wear the Bose AE2's comfortably!

I will test them out on my Yamaha receiver shortly thanks to the included 1/8->1/4 adapter that is included.