It's about the same cost as a similar luxury end standard mattress. It doesn't overheat or outgas like the Thermopedic. At queen size or above you can get a split mattress so each person can have a personalized setting. You can also get adjustable beds for additional comfort.
I've had mine for over ten years and it's still going strong.
Nice thing is that it is adjustable. Some nights you might want it firmer and other nights not so much. You can also get toppers for it.
Also easy to move. Just deflate and put all the parts in a couple of relatively small boxes.
We’ve had a sleep number for about 25 years...but are looking for something new to top it with...maybe latex