Me and my husband love this mattress! We have been sleeping on a Serta 10” full sized mattress and it did not last for us, it had springs sticking out of it after it started sagging and it was pretty much flat as a pancake. We bought the Lucid mattress in a king sized and it’s great, we’ve had the best 3 nights of sleep that we’ve ever had. We let the mattress expand for 8 to 9 hours and then slept on it because we couldn’t stand sleeping on our old mattress one more night. I can tell this mattress is going to last us years and years I highly recommend this mattress to everyone.