Finding a bed that works for me is a tough problem to solve. See, I was born with a tumor in my spinal cord. I had major back surgery at just two years old, which included permanent removal of parts of my lumbar and lower thoracic vertebrae. Nearly 40 years and 400 lbs later, I'm severely disabled, bound to a wheelchair other than a few transfer steps with the aid of a walker. I live in constant pain, and typically couldn't sleep for more than about five hours at a time without waking up in horrible agony from lower back pain. My king-sized Original Purple Mattress is everything they say it is. I can sleep as long as I want now! Yes, I'm still in great pain when I get out of bed, though less than before... but while I'm in my Purple, I'm in very little pain, if any at all. Every time I get into bed, my spine goes through what I call a "decompression period" in which my pain levels skyrocket. After it decompresses, I can't get back up for a time, as my discs are very sensitive and tender during that time. With every other bed I've used, that decompression period is about 15-20 minutes, and the subsequent "can't get back up" period is at least two hours. With my Purple, decompression is down to maybe 2-4 minutes, and I can get back up less than an hour later if I have to. I can -feel- how well-aligned my spine is. It's amazing! So far, about two months into using it, it's holding up very well. I had a Tuft and Needle previously that gave up any support or firmness within two weeks and just became a saggy mess under my weight. The Purple is holding its firmness nicely, and feels just like it did the day I got it. Moving around and rolling over isn't as hard as I feared. Memory foam or pillow-top coil spring mattresses are difficult for me to move around on with my disability. I worried that the Purple would be even worse, given how much give there is in the top layer of hyperelastic polymer, but it's actually the opposite. It manages to be firm enough for easy movement, yet still soft enough to cradle pressure points, just like they say! If you're worried that this is all just very clever advertising (which admittedly, it is amazing!), and that this is just another mail order mattress, don't. It's just what they claim it to be. It's the one that's different. The patents don't lie! The specific nature of the ads don't lie either (they don't just talk about how well you'll sleep, they show you what's different about it and why, and that's a key difference!) If you have back problems, if you're very heavy, if you have difficulty adjusting to new beds or sleeping through the night, you owe it to yourself to buy a Purple ASAP!