I used this in the mountains at Tombstone Outfitters in Yukon the beginning of August. It was the perfect temperature rating for that time of year and was really light and packable for a 10 day backpack hunt.
The expander zippers on both sides are a game changer. I always need an XL sleeping bag as I move a lot in my sleep, which usually adds a fair bit of weight. This bag is perfect! The only downside when unzipping both sides is that the bag isn't as well insulated but even just zipping one side it gives WAY more room than regular bags and weighs less.
Very happy and will recommend!