I bought this earphone for the name reputation and the capacity to isolate the sound around. In average it is a good earphone for the price, but not really sure about the capacity of the air bud, because it not do much for me.
The bass is not terrible, if you want good one, you should have a bass setting on your device (mp4. etc) and put it at the max.
I recommend for the price, but for really good one, invest a little more.