Got this for my son for his upgraded Queen adjustable bed. First it took two full days to fully expand after opening. There was no chemical smells of any kind. Came with a tool to help open the tight plastic without cutting the mattress! Probably the best little gadget they could’ve put in this box!  Helped a lot. Works great on the adjustable bed! He said he sleeps solid on it. Not too hard not to soft, just right!!! Apparently our dog loves the bed as well. She abandoned my other child and has slept on this bed since we got it! Defn a descent mattress that seems to be durable to last for some many years of restful sleeps for my son!