I have suffered from insomnia for years; however, that changed as soon as I slept on the Serta Bristol Way Pillowtop mattress. I look forward to bedtime now that we have this mattress. We can't say enough about the delivery and set-up; it was fast and professional. The delivery men removed the old mattress set and set up the new set in less than 10 minutes. My husband and I are very pleased with this purchase and we plan to purchase another mattress set from O.co as soon as the need arises.