Huge thanks to the great folks at Hammock Gear for accommodating my trip this weekend. I cannot express my appreciation for the quality of their work enough. I now own a 20* Burrow and Incubator and both are exceptional.
Typically, I take the ratings on a sleeping bag and go ahead and add at least 15 degrees to it for comfort rating. Not so the Incubator. Last night, I took the 20* UQ down to 27 degrees and had no issues at all. In fact, I was the only member of our group in a hammock, and of the other three, two were freezing all night (in a tent, on cots) and the third was my son, who I put in a bag liner, inside a 50* fleece bag inside a 20* [ edit: 30*] bag with a catalytic heater in the tent.
I'm actually a little worried now that the 20* will be too warm this spring. Guess Adam and Jennie are going to get more of my money on a new UQ, because while I'm sure other vendors are capable of great work, I know HG will deliver.