I had just gone to the Kaiser sleep lab, a few days prior to purchasing the mattress. They asked me how well I slept that night. I told them that, to my surprise, it was much better than usual. This got me thinking about why. So, I thought that, with your 100-day guarantee and figured that I had nothing to loose. To my amazement, it completely solved my sleep problem. I must have told a dozen people and recommended they give T&N a try. I'm VERY happy that I bought your mattress.