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I use a klymit static v2. The thermarest neoair xlite was the other option that seemed reasonable. Basically they seem to be pretty close for the overall experience. The main differences as I understood them are that the thermarest has a better r value, which meant nothing to me since I wasn't camping in winter and that the kylmit was about half the price. And then I bought the klymit used so it was like $40.
Overall it makes for a comfy night of sleep and packs small. Feeling is like just barely adequate in a decent way. It's about as small as you can go without compromising comfort and integrity. Mine hasnt had any problems. I wouldn't jump onto it though. I live near the rocky mountains and air mattress is definitely the way to go in rocky areas. Also supposedly the klymit is like 1lb (manufacturer's specs so take that with a grain of salt). R value is also around 1.
Therm-a-rest neoair xlite is supposedly about 3/4 of a lb and r value of 3 (higher is better ->higher thermal resistance). so if price is not a big factor go with the neoair. Go for the klymit if you're on a budget and don't expect terribly cold temps.