Summary: I am on my second pair of the Apple In-Ear Headphones. I'm very happy with the sound quality/price I paid. The problem with the silicon buds manifest itself after about one year of use. The silicon buds will come off with minimal friction as I remove the buds from my pocket. The silicon buds just slide on instead of screwing on the shaft of the ear cylinder. Since Apple doesn't sell replacement silicon buds I can't recommend these earphones.
Summary: These actually fit my ears and I have no problem with the sound quality per se. However, I bought mine in late July and they already crackle and give my years little "electric shots" from time to time - and the headphone itself keeps falling off. Now one has fallen off somewhere and I've lost it, so 6 months post purchase I can't use them anymore.
Summary: I am dissapointed with the quality of the materials used - the rubber pieces protecting the cables where they enter the ear phones have perished. I paid a premium price - I expect adequate materials to be used in the product.
Summary: I personally found sound acceptable, if you want natural sounding bass you'll always need to go for over-ear headphones. The only plug earphones I've listened to with strong bass tend to sound unnatural. Ultimately at this size, you'll never achieve deep bass. The carry case is great if you don't want to unfurl cables every time you use it, but can be a little awkward to wind back up as if you don't get it right the plug can end up wound on to a corner of the triangular...