I just could not believe it. When It came in the mail my first thought was , Oh no, I think it's gonna be like an air mattress. And so I took it out , followed the simple instructions and Bam, let it do it's thing! I slept on it the same night, I couldn't wait, it's unbelievable!!! It's the most comfortable mattress I've ever owned and the price is AMAZING!! I have back problems and I can already tell the difference, my back says Thank You!!