The primary purpose of whatever goes under you when sleeping is insulation. If you get cold, you will wake up. Get Hypothermia and you won't wake up - ever. The air beds such as the Lilo to which you refer, and the Gelert that you give as an example will provide no insulation whatsoever. . They are comfortable, but you need a layer of insulation on top of them e.g. a closed cell foam mat. If you can stand a bit of discomfort, just use the closed cell mat, as this is by far the most cost effective insulation system you can get. It is also very light, so that is a plus if you are walking far to your campsite. The so-called self inflators are essentially air beds with open-cell foam inside. They are as comfortable as an air bed, and insulate at least as well as a CCF pad. But, they are expensive.