1st of all, the equalizer works like a charm. Best my songs have sounded on my phone. Now for the problems I have. 1) only 3 presets and no "reset to default preset" button, so really only 2 (1 for the reset of the other 2). 2) there are a few bugs while working with built in iPhone apps such as music where it freezes every now and then when I update the playlists, and the clock where it keeps playing after my sleep timer goes off (it pauses the music for a hundredth of a second before it continues.). The 3 stars will be 5 if these 2 issues are fixed. (1 star per issue)