Purchasing a mattress on line without being able to try it is not something most people would do, but we did. It was one of the best purchases ever for us. My husband and I were waking up with back pain from our old mattress for over a year. We didn't want to think about having to spend almost $1K on a new mattress. We have some friends who have a memory foam mattress. They have had theirs for over 10 years, and say it is still like new. So our quest began. After weeks of researching we purchased the Swiss Lux King size mattress because of the details in the description. After we ordered the mattress it was delivered in about one week. We followed the instructions for allowing the memory foam to expand and were able to start using it after two days. It has made a world of difference for us. It delivers on everything it said. It is on the firm side but we love it. Both my husband and I wake up pain free and rested. I would recommend this mattress to anyone who asks. It delivers on everything it advertised and well worth the price.