So what's your sleep number?

One of the nice things about a sleep number bed is when you have one person who prefers a firm mattress and one who prefers a soft mattress. Take me as an example, I really don't like mattresses that are really firm and my husband prefers a very firm mattress. Adding to our situation, this is an older home and it's really clear that it was not designed with anything larger than a full bed being planned on coming upstairs. Using an air mattress would be a much easier process than trying to bend a queen size mattress enough to force it up the stairs and a traditional queen foundation? Out of the question...It's why we opted for a platform bed since that eliminated the need for a foundation...