I had to wait a few painful days before I could get a friend to help me get the mattress upstairs (the ONLY downside!) - I was so keen to get to sleep on it I could hardly wait. I gave it a good 8 hours before I went to bed and it was pretty much ready. Wow!! I could not believe how wonderful it is - like putting on a pair of wonderful beautifully fitting shoes. The smell is so slight that was no bother at all to me and soon dissipated. I used to have a Hastens mattress that cost me well into four figures and it was feeling a bit soft and my back was aching when I got up in the morning. Having looked at all the conventional mattresses in the up to £2K bracket I decided "what the hell, I've nothing to lose as I can return it if I don't like it". Within a day I'd already made up my mind! The mattress is staying, my back is renewed (and it's a very well worn back!) and I"m sleeping so so well. One of my best purchases of the year (next to my trip to see the mountain gorillas in Uganda which I also recommend!)so thank you Drift - I think this is the best in it's bracket of the foam type new rolled up delivery mattresses.