Bought for top of a triple bunk also purchased from wayfair. The mattress has had no complaints and the children enjoy sleeping on it. Only downside is the children on the bunk underneath are able to pluck the underside of the mattress leaving smiling stringy bits. 
I would have no problem reordering this mattress if I needed to as it’s comfy and firm but not to firm and has had three different children sleep on it all without complaints.