We receive the mattress over a month ago and our sleep has improved so much!! Good solid mattress not to soft and not to firm. Prefect for us

I sleep great on this mattress it's not too soft and not too firm so it's perfect!! It's still supportive while not being too firm! I love it!

Nice fluffy comfy mattress

Serta Perfect Sleeper X Knox Firm Mattress

It's comfy and definite upgrade our son loves it

This bed has been comfy from the start. No break-in period. Sleeping better.

I took a promotion and choose a better mattress, is hybrid.

Nice twin mattress for my grands to sleep on.

I been sleeping for about five days and it just feels good!! rested and ready for the day

Solid mattress. Serta has proven quality and comfort.