I have been using mattresssince 10+ days and found it very very good. I was using coir mattress before and it had some leveling issue so had to change. This one keeps firm but medium softness. It also gives foam softness on both sides so can be used on either side. I didn’t had back pain but had some discomfort while sleeping on one side with old mattress. This one is not problem with new mattress.
I would definitely recommend this one for family. I brought queen size and will consider it for other size too. Thanks.