...while inflating this thing. I have a couple of Aerobeds that work great - pump is attached and a simple button allows you to fill and adjust firmness quickly, no sweat and no swearing. This Coleman has a separate pump system that you must hold firmly in place while filling. The cord is very short, so you have to position it just right . The pump falls out easily and air whooshes out, so you have to start again. You are either struggling to put air in, or letting it whoosh out while trying to push the plug back it....so difficult to adjust firmness. Once filled, there is no way a fitted sheet will stay on it - the "division" between upper and lower mattress doesn't indent to hold it. So no bottom sheet. The bed is not all that high off the ground - maybe 24" max. And it is uncomfortable - stiff and kind of unstable feeling on the floor. I would return it, but i've got a full house for Thanksgiving coming tomorrow. Don't know which relative I dislike enough to assign this bed to..... I will only buy Aero Bed brand in the future. This wasn't worth the $, nor the difference in cost for the Aero Bed brand.