Four stars for quality, because the stand moves a bit too much, especially the leg that supports the snare, whose foot has a tendency to shift backwards, putting the leg at an angle. It's probably inevitable with these designs where all toms are affixed to one unique frame.
As a total beginner, who has made an impulse buy, I can't compare it to other heads, but the rebounds feel nice. Same for the kick, as a beginner, I have no comparison basis, it feels way too bouncy, but I suppose you couldn't do faster tempos if it wasn't, because your foot ain't gonna beat 300 times a minute.
I picked up drums to finally put some rhythm into myself, as I am atrocious. Therefore I could not really care less about having realistic sounds, yet what comes out of the headphones sounds like drums. No problems there. I tried a few different sounds, latin, jazz, rock, all sound good. Probably nitpickers are gonna nitpick, but this is not a pro set for a pro band :)
I have put 3 on features, because I only learn some rhythm (I know, repeating myself) - therefore I haven't tested anything on the sound module yet, except metronome, kit selection, and individual toms volume sliders.