Before I got my WM Ultralite, I had a Marmot Hydrogen. Unfortunately that bag did not come in "short" so I had a lot of unneeded space at the foot, which meant I often had cold feet even with my dog available as a footwarmer. However, the Hydrogen wasn't warm enough anyway when the temp got below freezing, even with all my insulating clothing on.
_________________________
May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey