The top is not perfectly flat, the black cross pieces are just a touch higher than the rest so if your TV stand hits right there you are not in a level space. 

Also the way the bottom is designed leads to some instability in the piece. It's raised by the black cross pieces and then has a supporting piece along the middle. We found it really needs support on the ends as well. 

We will make some changes to make it more stable but if you are looking at this for a very large TV I would recommend finding a more solid piece.