Got mine yesterday and I can only agree with the previous speakers: this is a fantastic little synth!
I've been using synths since the mid 80s and have owned or used a wide variety of analog and digital synths, such as Korg Poly 800, Roland Alpha Juno 1, Akai AX60 (still have this one!), Ensoniq EPS 16+ and ASR-10, Roland Juno 106, Korg 707, and various ROMplers, but it's seldom I've had this much immediate fun right after setting a synth up for the first time.
Granted, I know much more about synthesis now than I did when I bought my first synth, but I find I can think of a sound and then set it up in a matter of seconds. Not to mention that it sounds great.
Also, I've never played a synth with mini keys before and I thought they would be horrible, but I actually find them quite playable. The keyboard is at least an octave short for actual playing though ;-) No matter, I plan to use it as a solo/lead synth with my band and I'll be playing it from a 73-key master keyboard. I see the MicroBrute more as a small module that has a tiny keyboard as a bonus. The keyboard will certainly come in handy in my home studio.
Good job, Arturia!