We bought this bed for the reason many people buy it--one spouse likes a firm mattress (me) and the other likes a soft mattress (my wife). But if you expect the mattress to resolve the problem--don't get your hopes up. Although my wife finds it to be comfortable, and sleeps well, I find it is the most uncomfortable mattress I've ever slept on. Many nights I only get 2 or 3 hours of sleep (after the sheer exhaustion of tossing and turning until 4 or 5 a.m.). I started out with firm settings, but later tried a wide range of sleep numbers, and whatever number I select, I find that it feels like I am sleeping on a bubble and I can't relax. I'm fit and athletic, but thought maybe I was just having general sleep problems. Then I found that when I am away from home and sleep on innerspring mattresses, I sleep just fine. I dread going to bed at home now, and have not come up with any solutions (nor did customer service, when I called).
So be warned--the idea of setting your own firmness is appealing. But some people will find that they can't sleep on an air mattress. If both partners feel that way, you can always return it within the 30 days. But if you have different opinions, you may be faced with your original dilemma--how can two people who like different levels of firmness get a good night's sleep in the same bed. Select Comfort is not necessarily the answer.