I ordered this because it had really good reviews and the bunk bed I ordered said to buy a 5" mattress for the top. That being said, 5" is so little, and I'm afraid it will be uncomfortable and not enough support or cushion. Also, it smelled soooo chemically out of the box, but after a few days of sitting its ok. Our bunk bed has not arrived yet, so I will update when I get to actually try it out on the bed.