Has anyone had any experience with the thermo-lite emergency bivy sack? I'm tempted to get one for minimalist summer weekend overnight trips just because it packs down so small. My current summer sleeping gear packs down really small as it is, but this would be even smaller. Just curious if anyone has tried this thing out.

I'm always working on compacting my summer weekend backpacking gear. This holds the same fascination for me as always reworking my PSK to make it better or smaller or finding the perfect container for whatever. Yes, I could walk into the woods with just a knife, but that's over the normal fun/comfort line for weekend trips for me right now. I 'm trying to decide if the themo-lite bivy is also over that line for me. It's cheap, but I'd rather not throw away the $20 if someone has already tried one and found it not to be worth it.