I have the xtherm (the large mummy, I recommend the extra width and height so you're not balancing on a thin strip) and I bought the wife the klymit insulated to get her a thicker pad to try (vs the 1" pad she had) out but didn't want to drop as much money initially since she doesn't go out nearly as much as I do currently. The klymit is fine and blows up faster but I prefer the xtherm (even with the bit of crinkle sound), the deep channels in the klymit make me think I'll bottom out a hip or such at some point. If going the klymit route check out Costco, you can get the insulated pad with a pillow for $70. That's why I went that route for the occasional usage for the wife,.