Great mattress and great price. Love, love, love! Just got it a couple of days ago, but We don't wake up sore anymore. We had a king size coil mattress name brand that we paid alot more for and it was less than two years old and was a firm mattress. We were always waking up sore, we even put a foam topper. On it but after a while it did not help. My husband has back problems and this mattress supports your body alot better than a coil mattress. As soon as we started unwrapping this mattress it was inflating that quickly, by the time we got it all unwrapped in about 3 minutes it was fully inflated to its 13-14 inch thickness. I would definitely recommend this mattress!