PROs: This product is really great if you want to try out sampling-MIDI-DAW opportunities. It has the possibility to play virtual instruments (with a notebook, DAW, sound card of course), upload sample packs to memory card, plug in additional drum pads, switches, pedals, etc. It is really great to test if bringing electronis in to your play is the route you want to take. If yes, you should sell this and buy a better product (see cons below), if not, sell it, and you lost only minimal money.
CONs: The top two pad is not playable, it is just good for programmed stuff like all mute, etc. The remaining six is okay, but you have to tweak with the sensitivity. Loading samples is awful slow, you don't want to change it in the middle of a song. One of the knobs in front shows wear after light usage less than one year.
SUM: To see if bringing electronics to drumming, this is perfect, it is really versatile, and you can do everything what more expensive stuff provide - in a less perfect way.