My husband is 12 inches taller than me and he loved firm mattresses and my hips require a slightly or even a more slightly soft mattress. This has been the best thing we ever did!
We just bought one over a year ago with the adjustable frame and the vibration. We love it. We bought the CalKing, but all one frame, rather than 2 beds pushed together...so when our frame goes up, the whole thing does. We can sit and watch movies and I read the books to the kids and everyone has their spot. My husband had a head cold a few weeks ago and we were able to raise the head of the bed just enough to take the pressure off.
When we bought it, I was pregnant with our 4th and our mattress was 10 years old, so I talked him into it. I like that if a part wears out, you can just buy that part....not get rid of the whole thing. We also get adjusted by our chiropractor, so that helps us with our back pain, but a good night's rest and proper support after an adjustment is wonderful.
I LOVE the vibration part of it. If I can't sleep, I turn it on and I pass out. I do the same, throwing my kids into the bed. Also, my job is very physical and I'm on my feel 90% of the time, so by the time bedtime comes, the vibration on my legs feels divine. My husband told me we didn't need all those bells and whistles, but we both are sure glad we got them. We use them more than we ever thought we would.
My girlfriend has one, so I checked hers out and waited 2 years before we bought one. No problems at all. We did watch the guys put it together upon delivery, so when we moved, we knew how, where and what.
The deal from Alana H. below, about the same numbers, but it feels different, is because the number is based up on the amount of pressure exerted from above. So my husband and I do not weigh the same and we can have the same number, but if we trade sides, it's not remotely the same. The number is based on your body exactly.
Our last bed was a Simmon's Worldclass Beautyrest and he paid 1/2 of what we did for our Select Comfort. We loved it because it has springs, but they were not connects, so when my husband moved, I never felt a thing. We both were supported well. Sometimes we do miss that bed, since the Select Comfort is still a glorified air mattress. They are totally different...but we are glad overall, that we bought the Select Comfort.
Maybe stay at a hotel that has Select Comfort for a few nights. The first night, we weren't sure, since It feel different, but a few nights into it, we were happy. It's cheaper than buying it and regretting it. Also, you can buy them online when people are selling them for fraction of the cost. You can also get a new zipper topper for hygiene reasons.
Someone said that you can return it, which is true, but you can't return the frame....just the other parts. FYI. Our salesman wasn't very intelligent....on oh, so many levels.