Hayden Wright wrote a review of Patagonia Nano Puff Insulated Jacket - Men's on October 23, 2012
Familiarity: I've used it several times
I've had the Nano Puff jacket for about a year now and it is awesome. Skied with it on in Maine all last season and it was the best. I wore it over a lightweight t-shirt and under my Saga Anomie Jacket. This set up kept me cozy warm all season long with no problems. Even on a couple days when the temps. were around -10 at the summit of Saddleback. I'll definitely be rocking the same get up this year. The best part about these jackets other than their warmth, is their the packability. These things get so small when you pack them into their own pocket, it's like they aren't even in your gear bag. I loved this jacket so much that I went and bought the vest version and will soon be buying the hooded version. Thanks Patagonia, you guys hit it out of the park on this one!
The picture below shows the jacket packed up in it's own pocket and compared in size to a standard 32 oz Nalgene Bottle.