The engine itself is a master piece for Kontakt, they've using in other libraries but this is the first I got so is a nice surprise. The sound is awesome, you can check the video and that is what you get. It is very versatile and comes with 8 kits and 2 blank to create your own. Each one with 2 MIDI songs, including parts and different patterns. In Session says it will be upgraded with more kits and patterns, so that is a lot for the price. Glad I jumped right at the intro price.