It IS a platform, but being so large I thought it might have an interior, which it doesn't. Shame. Beyond that, it looks good on the outside, but the interior bracing system it has is pretty awkward to put together properly, and keep together as you put it into place (mine broke twice, and needed re-gluing). The ends of the cross-braces poke out the middle of each exterior face, which I didn't like and didn't see a need for, so I chopped them flush with the walls and am much happier with now.