David Hill wrote:

I know that this is totally off topic but thinking about how many
gardeners have back problems I thought I'd ask my question here.
It's time for me to change my mattress and my back is giving me a lot
of problems. I'm wondering about a Memory foam mattress, but I don't
know anyone who has one.

Are they as good as the advertising says,

Yes

or is it just hype.

No

Caveat: try out as many bed/mattress combinations as possible. You
really should spend as much as you can afford - anything else is false
economy IMO - and you don't want to make the wrong decision.

--
Chris