[This review was collected as part of a promotion.] I've never been able to sleep well, and I usually toss and turn all night. This mattress has made a world of difference! It is so comfortable, and my body doesn't ache in the morning like it used to. It cushions my body to where I don't feel pressure on my back or shoulders, but doesn't feel too firm. I'm usually really hot when I sleep, and I wake up feeling sweaty. This has really changed that, because it's so breathable and keeps me cooler. I love the quality; it's sewn with no loose strings or frayed fabric, and I think it will hold up against wear and tear and last a long time. I think it's a good mix that it has both coils and foam, because it provides great support while still feeling soft and comfy. Serta has always made great products, and this is no exception.