I waited a couple months to write the review to see if the mattress would hold up. I unboxed this the day it came. We had planned to camp out thinking the mattress would take awhile to expand. After 4 hours it was already full size. The memory foam smell was not as overpowering as other mattresses we've tried, so we slept on it that night. I would sincerely describe this as more firm than others I've slept on. Very supportive. We have 2 adults, about 140 lbs and 220 lbs. The bed still looks brand new. We put it into an old waterbed frame and it completely feels it out, true to size.