This is a moderately old thread but I thought I would add my experience.
Last November I tried out a S.O.L./TL2 during a road trip from Dallas to California. The first night was in the mid 20s, clear, and only slightly breezy (winds picked up in the early AM). I used a ground cloth, inflatable mattress, and the LT2. No tent, no tarp, no real windbreak. This was before I had ever seriously considered hammocks. The combo was good for about 4 hours sleep....but it was an honest 4 hours of sleep, not 4 hours of diminished consciousness.
I was actually pretty impressed. I mean... sub freezing temperatures, just about zero protection, and I didn't die!
Now for the relevant part: I was fairly gentle with it (no bare ground, no boots or watch, etc.) and after one night of use it was looking kinda worn down in places. I have used it a few more times since then and it doesn't look a lot worse but there is one tear clear through and the aluminum is gone in a few areas.
I think it's a great bit of emergency gear. It's in my car kit now. I'm not sure I'd trust it to last 25 nights.