This mattress worked wonders on my back.  We changed from a coil/spring type mattress that was mid-high range but no longer sufficed for my back problems.  I used to have to curl into a ball if I had slept on my back before I could get up due to the stiffness of my back.  I haven't had one time of doing that since getting this mattress.  It does feel "firm" but because of the gel memory foam it still has a "soft on top" feeling.  I will add that my back problems were helped tremendously but my husband's sciatic pain is till present.  He feels the mattress is a little "too firm".