Not from personal experience, but it seems that it's an all around decent synth/sequencer/sampler that makes a good musical scratchpad. People like it, and if I had a g to spare, I might join in.
Personally the association with Teenage Engineering makes me more concerned that this will not be as exciting as it sounds. TE's Op-1 is a fine piece of kit, but their recent offerings have been very underwhelming. Also the placement of the crank and the form factor look very un-ergonomic.