While the mattress  is firmer than I expected I am pleased to report this is a very good mattress. The packaging said to allow 48 hours for it to come to size but honestly as soon as the plastic was removed it sounded like a fan came on the mattress was fine in only a few minutes. I did give it 24 hours before sleeping on it. I have used it for 2 weeks now and I love it. I donât wake up with aches and pains or anything anymore. In the past I would wake up with back and hip pain no matter which way I slept. This mattress provides proper support for my curves and I believe that is really helping me to rest well and wake up refreshed