Shelton wrote a review of MontBell U.L. Super Spiral Hugger #1 Sleeping Bag: 15 Degree Down on August 16, 2013
Familiarity: I've used it once or twice and have initial impressions
I had this bag out in mild desert night temps 40's/50s and was borderline cold. Regular size , 5'10", 155 lbs, on a nemo insulated pad. I originally read the reviews for the #3 bag that seemed appropriate but was warned it ran cold so I went with this. Turns out this bag is not that warm either. My Marmot 32 degree bag seems warmer than this. I am not sure what to think but the down seems to get real thin when the bag stretches thus losing insulation ability.
I'd go with the long if you are over 5'10 also. The hood of the bag was smushed down over my face at just shy of 5'11".