When I stayed there in Feb 2009 in an upstairs unit, (don't get the one on the end next to Cholos - you will for sure get no sleep), it was hot, but I kept the ceiling and standing fan going 24/7 and it helped. The best thing is it's so close to Estel's for breakfast

Besides, the "AC" is a portable unit that looked more like an evaporater cooler that rolled around. Not sure how effective it would have been.