SJ -
"She broke her leg and this was a lifesaver!"
We were 4 miles up the mountain when my co-leader broke her leg. We self-evacuated for as long as she could stand but then it was clear we needed to get her warmer, drier, and rested. We got her inside the Emergency Sleeping Bag with her splint, pad, and the 3 coats we had on her. It was perfect, she was toasty in minutes. Even as the splint hiking pole tips were straining against the edges, it didn't rip. Now every single hiker with us is buying one too. It's just too small to not have on you at all times. I'll add the video of the event later but I can't give a higher rating for any product.

JB -
"Used it in an emergency"
This is the smart upgrade to an emergency blanket, and the only choice, really. It weighs nothing and works so much better than those cheap, thin, metallic "emergency blankets". If you've ever actually had to use an emergency blanket as I have, in situation where you were not planning on over-nighting outdoors, then you know they dont work well. "Never again", the Emergency Sleeping Bag is exactly what you need that situation, not the blanket.

TR -
"It worked GREAT!!!"
Used it in a notoriously ice cold hut (it was bone jarring cold, ice on the inside of the windows) in the mountains with a light weight sleeping bag. Worked fantastic with my light weight sleeping bag and clothing layers. Part way through the evening had to take some of the layers off (back to merino s/s top, merino tights and merino socks). Next trip, no sleeping bag just the bivvy as the weather will be mild.