I was extremely worried about ordering a mattress online. I also ordered the Square Trade Warranty. The mattress pad that came with the warranty came a week after the mattress (weird). The mattress pad is nice but its huge. The mattress itself is amazing. I had ZERO issues with it inflating. I mistakenly opened it in my living room and it inflated as soon as the packaging was opened. I measured 11.5 inches within five minutes. It's very heavy and not easy to move so open it where its going to end up being. I was also worried that it would not be firm enough but it is. It has only been a week but so far, I am really pleased. Time will tell I guess.