A LFS near me sells these tanks. In person, the tank is a lot smaller than it looks in pictures. The tank itself is only 13 gallons, and really only seems large enough for baby clams once a sandbed is added. Also, after seeing the tank in person, I would not put anything mobile (fish, anemones, snails) in the tank for fear that it would take a ride over the side of the tank.
With all of that said, I still think the tank is really cool and would buy one in a heartbeat if I had the disposable income!
Here is a picture A Splash of Life (the LFS I referred to earlier) took of one of their Zero Edge tanks.