I looked at them a little bit. They seem really well made and have some nice features, but also some drawbacks. Principle issues that turned me away were completely insufficient lighting on the 29 (and no aftermarket upgrade kits available as of yet) and the absence of hinges on the hood (if you need more access than is available with the feeding door you have to take the hood off completely). I was also concerned with the freshman bugs that all of the cubes seem to have had being that these are brand new.
To be honest though, I've been pretty happy with my nanocube. There are some solutions to the heat issues out there. Check out nanotuners.com. There are accessories there from lighting upgrades and more efficient heat shields to mini chillers.
