I forgot to mention that one preference I have is for the rectangular shape over the mummy or tapered shapes. I find that, as a side sleeper, I end up with arms or legs off the pad if they're tapered, but not problems with the rectangular. I would emphasize that this is purely a reaction to my own sleeping habits, not an indication that tapered pads are a bad idea.

In the Q-Core series, I pay a weight penalty of 2 ounces. OK, I'll leave my matches or flint-and-steel at home (3 ways to start a fire is probably just as good as 4, for what I do.)