Good sound, lacks durability
598460
Got it about a year ago for about $100 if I recall correctly. The bass was good and the wire was long enough to reach my ears from the pocket of my pants. Lacks durability however, with the right earbud almost coming apart completely after a year. This didn't affect the volume too much until about 6 months later where the product then stopped producing sound all of a sudden. It fell apart one night, was put back together, and then the sound no longer worked.
4854872
I received my Bose in-ear headphones as a Christmas gift, so I have been using them for about six months.  All of my first impressions were good.  They fit my ears well, the sound is good, and I can listen to spoken word content at a much lower volume than with the Apple ear buds.  But, the removable silicone tips fall off, get stuck in my ear, pop off, get lost, and after six months, one has ripped.  That would be kind of okay if replacements were cheap and easy to come by, but they are not.

Update.  So, if you go to the Bose website for support, they will send you free replacement tips.  Which is nice.  However, it does help me because soon after the replacements arrived, the wires broke down at the base of the 3.5mm plug.  So, these $100 in ear headphones lasted me about 8 months.  Since then, I have found several other earbuds that sound just as good in the $20 range.
4634689
Good sound, pretty good fit, but the band that goes behind your head broke after a couple of uses.
2324383
Really impressed with the sound quality, but worried about durability as the headphone jack cord is already fraying after very limited use.
3812037
I had no problems with the sound. I'm no audiophile, so perhaps I'm not the best judge, but I thought the sound was fine.

My biggest problem is that they broke after 6 months of mild use. I used them perhaps twice a week (for an hour?) and never mistreated them, so there is no excuse for them breaking. The left headphone just stopped working, there were no disconnected cables or anything.

My other complaint is about the cords. They have a flexible woven metal sheath. It has a horrible tendency to get bent & twisted up. Every time I used them I tried to straighten them out. Then I put them away in a pocket or backpack, pull them out and they're just as bent & tangled. I found it really annoying.

Overall I would NOT buy again. After they broke I bought a replacement by a different company.
4132311
While both stylish and capable of amazingly crisp sound quality, this product is not durable. Comfortable enough to stay upon your head for hours without worries of headaches and migraines due to the soft padding between both the ears and head. The only negative is that if you aren't delicate with these headphones, they will break on you and that happened to me about 6 weeks in with consecutive daily use. They are still functional and I can still use them, I just wish that I didn't have little bits of tape around the plastic.
3532549
The sound is good. Definitely a step up from a pair of cheap $20 earbuds. However, the wire-from-each-headphone had a tendency to tangle. The wiring near the headphone itself was a bit thin as well. After 5-7 months of use one of the headphones stopped playing noise. Admittedly I put it under a bit more stress than the normal user: I used them when cutting my lawn in the summer (humid, sweaty), I used them in the rain a few times, and I even ran with them once... so make of my build assessment what you will.
969665
I've owned two pair of these, they sound good and are better than the standard Apple-issued headphones, but both pair I've owned have broke within a year.
4388634
Iv'e had this pair since 2011 and the sound was consistently amazing since then. The biggest issue over time is the connecting wires to each headphone, as well as to the jack. They wear down eventually, and eventually come out, even when exclusively used on a  desktop- not in transit or exercising. I would recommend them but they won't last forever.
441289
Sound is great, design is great, however one of the metal wires that connects to the little flap for your head has broke, so questioningly the quality of the materials used to build this wears down somewhat quickly and only after 5 months of use with no attempts to break or damage the headset in any way.
791978
Great sound for the price, BUT I'm on my third pair in as many years and I'm giving up.... They are just too prone to failure, which means the REAL cost of owning these is not 150 bucks, more like a 150 bucks a year!
4921249
I bought these headphones summer of 2010.

Pros: The sound quality is fantastic, and the headphones are comfortable enough to wear for a couple of hours at a time. The cord is extra long (which can be a good or bad depending on your setup -- I found myself getting tangled in my chair more times than not).

Cons: After about a year, the headphones developed a 'short' where sound would cut out from the right ear. To fix it, I pinched/bent the cord where it connects to the headphones, but it's still an annoying problem that persists. After about two years, the plastic cracked on one side at the adjustable part of the headphones. I take pretty good care of the headphones (when not in use, they hang from a bar on my desk). I've noticed a few other reviews that have mentioned the plastic cracking after a year or two of ownership. I had to tape up the crack in order to wear them comfortably.

I would probably still recommend these headphones, but for the money I spent on them, I would have expected them to last a bit longer without physical/electrical problems.
1230416
Nylon is great, sound is good, durability is crap. First pair died after some gym use; 2nd pair the glue came apart and now has one loose ear.
2938604
These were good-for-the-price headphones. Good sound. Comfortable on the ears, but they were heavy and not for big heads. I would have given it four stars normally. I used it for editing at a desk. Very light use.

After 2.5 years, the headphone speaker snapped off, and is attached still by wire. The other speaker just went dead a week after that.
4080102
This is a good, budget or spare Bluetooth/stereo-jack headphone. It'll deliver great sound, and will last with reasonable handling - but don't drop them on a hard surface though. I did, and one of the control buttons broke and I had to buy another pair. Phone calls go well in places without a lot of ambient noise; the mike is on the L side w. the controls, so you must wear them that way to use a phone, else the mike will face your back and not pick up your voice. They look real expensive, too, but the trimming & paint wear easily so put 'em in a case if you want them to stay floss, don't throw them in a backpack.
4046611
I like the sound of these headphones a lot.  I had a previous similar model from Denon before that lasted for roughly 2 years at my work desk, so I bought three sets of these as replacements - figuring I would be set on headphones in the office for the next 5 or 6 years.  I'm about six months in on this first set, and the left bud's wire coating has torn through, causing the bud to go dead.  I realized that my unfortunate luck with this pair was that they moved around a bit more, acting as an emergency pair when I forgot to bring other earbuds for working out, and getting shoved into go-bags - instead of having the easy life of my first pair, sitting idly on the desk for their entire life.

In short, this is a very good pair of headphones for plug and stay environments.  The sound's good for the price and the noise cancellation has passed the loud coworker test on many occasions, which have made them a perfect office companion.  Just don't expect them to live up to wear and tear.
4825997
I've been through two sets in a few months, as the well durability isn't great (sound disappeared from an earpiece each time). Thought the first was a fluke to checked with a second pair. Quality sound, but be prepared to fork out for a few pairs if you like the product.