Great sleeping bag
I bought it for my wife. She spend few nights with this bag and loves it. It is light, warm, and very comfortable. I think that this product is exactly what I was looking for.

Let me know if you can find anything better!
You're getting two reviews of this bag for the price of one here. YAY! I purchased this bag for my girlfriend who has included her first-hand perspective of the Marmot's women's Pinnacle following my rambling. I've had a synthetic 0 deg F rated Polar-Guard 3D bag for the past 10 years, it's definitely had it's use and the materials have performed beyond their technological abilities and duration stated at the time (my synthetic "old-school" has lost much of it's loft...but is still rather cozy at 25F ). Though current technology is gaining on making synthetic perform (and pack, and re-pack over time) as well as down, the loft and compressibility of the Pinnacle is very impressive - so is the weight- close to 2lbs lighter than my bag (This adds up over the miles). Aspects that stood out in my search for the best bag for the dollar, was Marmot's tendency to focus on the women's specific approach to much of their sleeping bags - focusing on extra warmth on locations of the female body that tend to cool more quickly relative to men. Marmot also had some of the highest reviews of the quality of down they use. Almost all of the customer reviews that I read from various styles of Marmot bags claimed to have a comfort zone at least at the level of or cooler than what the bag was rated.

i love this bag!
I just spent me first few nights out in this sleeping bag and it kept me warm despite my very cold nature. It's fluffy, light, and toasty. I would highly recommend this bag to anyone!