We are using this as our primary bed, and while I am FAR more comfortable on this mattress than I was on our old coil mattress... I can't help but wish that it would soften up a bit faster. We had had this around six weeks now. I also purchased two tempur pillows (the cooling one & the body pillow). I have found that while I used to exclusively be a side sleeper, I am far more comfortable on my back on this mattress. When testing these out in the store I really preferred the medium as opposed to the soft. Which really is a head scratcher considering the soft has a more firm feel that the medium. I think the firmness is actually referring to the feel of the way you sink into the memory foam VRS the actually plushness of the mattress. Overall I'm happy with my purchase and I would buy another tempur... next time I'm getting a medium plush though.