Good mattress, but takes some time to adjust
I recently purchased the Flo Anti-Gravity Natural Latex Mattress. The mattress feels very different from my old mattress, so initially I found it a little difficult to sleep on and felt like I was slightly sinking/sloping. It also felt a bit warmer than expected.
However, the mattress is comfortable overall, and importantly, I haven't experienced back pain while sleeping on it. I think it may take some time for the body to adjust to a new mattress.