Hi MeJane,
You can see my thoughts about airbeds in general in this article.
Of course there will always be some people who may do well with an airbed or legitimately prefer them over other types of mattresses regardless of any inherent weaknesses in their design and for those that decide to purchase an airbed anyway then I would tend to avoid Select Comfort (Sleep Number) or the major manufacturers in general and look at some of the airbed manufacturers that are listed in post #3 here that have better quality/value and are more transparent about the materials they use inside their mattresses.
Phoenix