We ate at Yak and Yeti for last X-mas day lunch and loved it. The food was phenomenal. We ate upstairs at a window table which after looking around I thought was one of the better locations. Some of the interior tables had kind of a dark feel to them.
We've eaten at San Angel once and didn't care for itThe atmosphere is nice, but we didn't think the food was all that great. They didn't seem to have much of a variety on the menu. Lots of people love it, but we really don't have any desire to go back.