I decided to get a memory foam mattress over a month ago to help with my rheumatoid arthritis since I found my old mattress did not offer any support to my joints anymore. It is very heavy and we struggled to get it into the room but once open we managed to get it into position. All I can say it is remarkably comfortable and support my joints.The only remark is I should have measured my king size bed properly since the mattress is slightly narrower then my base but I can live with that for the comfort of the mattress.