I bought a Serta medium memory foam first, was too soft. With Wayfairs 100 day trial I was able to return it hassle free.
Wayfairs gets 5 stars for service.
Now to the mattress, I have had 3 back surgeries, so I need a firm mattress.
I have slept on my new firm Beautyrest 14 inch firm. I absolutely love it! Very firm and comfortable.
V