There are so many reviews on these speakers, all +, but each has their own little quark. All of them are slight, but 1 said weak treble, another weak mids, another weak lows. They all would agree though that the bass is quite incredible, sometimes ending up being a bad thing (most don't though).
Only thing I'd like to add is that there is a noticeably subtle hiss when the volume is low and your <~2 ft away. One review said that was standard for this speaker class, but I'm not sure. As long as you keep em 3+ ft. and play at a relatively normal volume, I wouldn't worry about it, unless this sort of thing gets to you.