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.

This mattress is exactly what we wanted a comfortable mattress and a good nights sleep every night. Thank you.

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

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.

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

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

Very comfortable mattress. I am a side sleeper and found this to be super comfortable. Soft yet enough support.

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

My husband loves a firm mattress but I need a little cushion. This mattress is a great compromise—we are so thrilled to have it!