It looks really nice now that it's up!  My contractor was nervous to install when he first saw it since so much stress is put on the brackets and he didn't like the way the brackets fit on the beveled edge.  Plus, there weren't any mounting instructions.  I called the company and they mailed me some little felt pads that adjusts for the beleved edge and some "supplmental instructions" -- and then my contractor hung without any problems.  Just don't know why they wouldn't automatically include the felt pieces.
Again, great look for the price - but just took awhile to get it on the wall!