I have a lot of plug-ins now and very good ones too, but the last time I had so much fun, and got so fast beyond just browsing presets, was years ago with a hardware called Arp 2600.
The technical review was given already very detailed by ZaBong, No need to add to that. I keep it emotional.
Instruments touch you or they don't.
This one does and has a very responsive developer. I am controlling it with a LinnStrument, a perfect companion as the modulation posibilities deserve expressive controllers. Though it isn't yet MPE compatible, it is already just fun to play and fun to explore. Plus Dmitry wants to add expresivity for all these LinnStrument, Roli, Continuum and alike controllers... Definitely get at least the demo - the slight noise after 90 seconds is not pushing you out of the music. I bet you won't hesitate to get the real thing soon. A bargain till the end of the year and well worth after it as well...