I am not actually familiar with the other Modal synthesizers, but after seeing some early reviews and demos of the Carbon, I knew it will be interesting.
I wanted to gave it a proper testride before writing a review, and now after 3 weeks of fairly intense use I am not disappointed at all. The Carbon is a great sounding, well-built synthesizer. Definitely has a learning curve, but once the location of knobs and buttons are in the hand, all goes smoothly.
Sound palette is as wide as it can get, the sound design capabilities are endless. It can growl and can purr, emulating classic synth sounds is as possible as going into weird and new sound territory.
I haven't even tested the USB connection to my computer, haven't given the software a testrun. Probably it does work, why wouldn't it work?
The only downside is the mod-stick, it literally "sticks out" (pun intended) in a way that might not be comfy for everyone.
Overall, I'm a satisfied customer and looking forward to have fun hours with Carbon.