I just received this mattress today and it is amazing. It expanded to full size within 20 minutes and I was laying down for a much-needed nap within half an hour. There ws no ogg-gasing or odor whatsoever. It has been absolutely incredible. I have not been able to sleep for months due to 3 back surgeries, osteoarthritis, hip pain. knee pain, neck pain, and I laid down on this mattress and fell asleep for 3 hours which is unheard of for me. Thank you Lucid and Wayfair for this incredible mattress topper. I never thought I'd be able to afford one, and now that I have this one I don't think I'll ever sleep on anything else. Truly incredible. And Wayfair customer service is top notch!