I bought a sleep number 5 years ago after a friend of ours raved about theirs and I’m so glad that I did. Never had any problems and find it extremely comfortable. The lowest class one felt like an air mattress so I’d steer clear of that. I went with a higher end one and paid just over 4K for a king size. A couple of things led me to purchase this as I would not normally spend this much on a bed. First and foremost, it’s extremely comfortable. Second, my wife likes a soft mattress ans I like mine fairly hard so this accommodates both of us. Third, it comes with something like a 28 year warranty IIRC. And lastly, it comes apart and goes together in pieces approximately 3’x3’ and it easy to get up stairs and around corners and they assemble easily. This was important for us with a King sized mattress. Check out a how-to on YouTube if you’re interested. I hope this helps. Personally, I never liked the Tempurpedic beds but it’s all preferences. Try them all out and see what works best for you.