I have 2 UQ, both 20 deg, 1 is full length, the other 3/4. I use the 3/4 for temps between 40 and 65. The full length for colder. And if it gets real cold, I am going to use both. Haven't had the chance to try it yet, but maybe this year I will.
I don't want to use a pad, so the full length was the first UQ, then the next year,(or rather last year) I got the 3/4. Boy, that sure was a nice X-Mas.
I'm a member of PETA!!!!