We purchased one about 5 or 6 years ago, and will always buy them. I like being able to adjust the firmness depending on the condition of my back.

Because they are a standard size, you can buy any "memory foam" or latex foam mattress topper and insert it above the air chambers. For the sides and middle foam supports, just take one out and take it to a local upholstery or foam retailer and have them cut replacements for you out of the same density foam.

We bought the second from the highest level bed at the time, in a California King, and couldn't be happier. Our previous beds lasted only a few years, and none of the warranties ever covered the deep depressions that happened in the middle (and no, we didn't flip the last three mattresses because they are all one-sided now). If you are going to buy a standard mattress, don't get a pillowtop. Get a firm slab, and you might be able to make it last a few years.

We also look at the "memory foam" mattresses but they tend to be softer when its warm, and you sink in more. Might be great for cold weather areas, but LOML decided she didn't want a warmer bed!