This mattress is very firm and I love the fact my partner can move around, especially during the night and I don't bounce with the movements on my side. I actually don't feel it at all. Also, I've always had a boxspring with my mattresses and with this one I chose a platform. You can't tell the difference at all, and I actually like it better that way. The quality of the mattress is top notch and made to last for many years.