Mattress side does not sag. About the comfort level, I think it's too early to say. I need few weeks to be able to tell the difference.

It to early to tell if the mattress lives up to expectations - need to follow up in a year to get better datum.

Very comfortable mattress has that pillow top feel but yet it's firm and supportive. Great for a restful sleep.

lots of support, way firmer than the store model. we both don't really like the firmness after a week sleeping on it

I told my husband this morning that I felt like I really rested last night. He agreed. So far so good. 👍

This Cobalt Calm firm pillowtop is a nice balance of cushion and support. Just right. Our dogs love it too 🤪.

Love the new mattress. Firm is great. No more pain in my hips or shoulders during the night and in the morning. My wife is still adapting.

So far love the bed top lift and mattress comfort , frame just sits a little low may have to use riser for height other then that it work

This is our 1st firm mattress. So far it has taken away much of our back pain. Very supportive. Decent sleep.

Mattress was purchased 7 months ago and slept well initially. Now the Mattress has started to sink entirely around the edges.