Really, really cheap material.  This stuff nicks really easily.  I love the design, and it's not difficult to put together.  However, the LED strip has tape that doesn't stick.  The instructions show that they provide 9 brackets to hold the LED strip, but they really only provide four, which isn't enough, because the tape on the strip doesn't hold for more than a few hours.  My advice is to not buy this and instead wait for something with better material and adequate material to come on the market.