We tried the soft side for 7 to 10 days then switched to the firm side. My wife found the soft side a little saggy but instantly liked the firm side and after a few days is finding relief for her constant sore back. I personally like the soft side and after having hip surgery in February discomfort has vastly improved since switching to the new bed, although it did take a few days to get used to. Added bonus is having separate mattresses so we can choose our personal preference. Great bed.