I bought firm mattress and bed 3 years ago from benson beds with 5 years warranty. With clearly following instructions to keep rotating the mattress started feeling back pain and realised there is a clear dip on the mattress. I complained and they sent a technician who accepted that the mattress has gone soft but it’s ‘natural’ in 3 years. Based on his comments benson said that they can’t do anything. It’s surprising that if a ‘firm’ mattress is expected to go soft in 3 years than why to sell with 5 years warranty? Stay away it’s just their marketing tactics to sell but they don’t bother after selling and don’t care about warranty. Need to buy a new mattress now as I can’t sleep on this one anymore.