I used this bag in early September in the Colorado mountains. First night got down to about 30 degrees and the second night was in the upper 30s. I was sweating both nights.
I got the regular bag. I'm 5'10, 190lbs and this bag fit great. I'm a side sleeper and normally roll around a bit and didn't have any issues feeling constricted.
Great bag. It packs small, is light and warm for me.
This review was written in the old system and had content requirements that are different than reviews written today.