Amazing that no one has reviewed this remarkable beast yet. Forget the fact that it's free--Rez is a fantastic monosynth, period. The GUI is cool, the preset bank is loaded, and the sounds therein are extremely useful and inspiring. I have three instances of Rez in my default song project--and that's not enough as I usually add three more! Sounds are thick and incredibly expressive, and some of the patches respond to velocity in unique ways, making it very fun to play. If you haven't yet downloaded this and Texture, Ugo's other monosynth, do it now. I dare your jaw not to drop.