It is important to consider the size of the bed; a smaller bed is easier to travel with. Durability is another issue to be considered. If the bed is not used often, it may not be worth the investment for a more expensive brand.
Weight is important when considering a bed. Beds with actual frames weigh far more than air mattress style beds on average. Mattress size and thickness influence the comfort level and the space required for storage. Appearance may be important as well. A simple portable bed with nice linens may be a better option than purchasing a pricier bed.