Mattress was at a little over 8 inch within an hour. No chemical odor whatsoever. Love that the mattress protector was already on it. 

Unfortunately, I haven't been able to try it out. The daybed that I ordered from Walmart on August 30 was lost by FedEx, then located and returned to Walmart instead of to me. Wish I could have bought the daybed from Wayfair, but it was almost $100 more.