Are you thinking fresh or salt water? I would think you would have to deal with a lot of salt creep with a salt water tank.
I wonder home much maintenance a tank like that takes to keep all the calcium deposites off the stand and such? I do know it would have to be perfectly level! It must have some sort of very fine adjustment for leveling the tank. I would guess a tank like that would have some sort of minimum flow rate to keep the overflow water coating all 4 sides.
At least you would not have to ponder over whet to drill the overflow!
Very cool looking though!
From what I read its not much worse than any other open top coral tank.