While everyone's experience is different, as are the situations in which we use our gear, I feel the temperature rating was fairly accurate. WM is known for conservatively rating their bags, and I used the Versalite down to around 17 deg. with only a Capilene 2 baselayer and no socks, and found it warm enough to leave the neck baffle and hood loosened. These was even after an inflatable sleeping pad failure that left me practically lying on the bare tent floor—I had loaned out my foam pad to someone else who came ill-equipped.

What kind of sleeping pad were you on? And was it on stone, rock, or other hard ground that fails to retain warm air? Or was it snow, grass, leaves, or another more insulating surface?

*I meant to say: "This was even..." not, "These was even..."