Most of the samples are a little too bright/harsh for my taste and some toms sound weirdly clicky at high velocities, but for $26.99 you get a pretty versatile set of kit pieces that I imagine would fit really well with the rock stuff you tend to do and can go lighter but also harder if you need it to.
I would compare it to GGD stuff in terms of overall quality, which is to say it's superior to AD2 and the likes, but quite a long shot away from feeling like playing a real kit on e-drums like BFD3 and SD3 (I imagine) get quite close to.
I like it overall and for this price, I can almost guarantee you won't regret it.