The wife have slept on this king sized firm Sealy Posturepedic mattress for 4 nights and sleep very well. Today I'm attempting to register the mattress to secure the warranty. At register.sealy.com there are questions about the mattress that I can't find the answers to in any of the sales paper work or on the mattress. Specifically: 1) Mattress Line -- ours is a Posturepedic, but, that is not among the choices 2) Mattress Collection -- the choices are Essential, Performance, Premium, but, I have no Idea which 3) Mattress Construction -- Tight Top is on the mattress tag 3) Mattress Feel .. well I know it's Firm. Sealy could make this process a bit easier.