I've had these for about a year and a half (I paid a lot more though, be sure to get them from Amazon), and they have served me very well in terms of sound quality and comfort. The bass response, as others have said, is extremely good, as is the sound quality.
However, and this is a big drawback (hence only 3 stars), the cord is made of horrible rubber which can easily wear if you aren't careful - I've been lucky not to have this happen. I found that the connector gets worn when it is plugged into any input and so can cause crackling since there seems to be an imperfect contact (also the connector is not gold plated as with some alternatives). The worst problem is that the rubber mouldings that fit in your ear gather dirt and wax which is impossible to clean, and this eventually causes the rubber to split, ruining the essence of the earphones.
If you are willing to keep buying new ones every year, then you won;t complain about the sound and comfort - however, if you want a lasting pair of headphones, look elsewhere (as I now need to after mine split).