I have seen this keyboard in person. Unfortunately, I have seen a very limited number of decent keyboards, so can't really comment on the quality, so please take my words with a pinch of salt.
As some people have mentioned, it isn't really for GH people. It's more "gamer" oriented. I personally liked the feel/finish of the keyboard and it seemed decent quality to me. The shape might not appeal to a lot of people here, but it does look a bit better without the plastic handles or whatever they are. That plastic just makes it totally hideous IMO. Again, since it's geared more towards the normal crowd, the design isn't what we normally see here.
An interesting feature of the Mech that I was told was, it has an audio DAC inside. I'm a bit skeptical about this since the specifications on CM's page don't mention that. But it certainly would be interesting if it actually has a DAC. USB 3.0 is a plus point. The one I saw had white LED backlighting, not sure if it comes in other colors or if it is customizable. The backlighting looked nice to me.