cosmicgumby wrote a review of Rab Neutrino Endurance Down Jacket - Men's on December 12, 2012
Familiarity: I've used it once or twice and have initial impressions
This jacket is exactly what I was looking for - lightweight and very warm (for winter camping in temperatures colder than 20 degrees F).
Two issues: 1) inconsistent down weight. In trying to decide on a color, I got two versions of the jacket in XL. Immediately I noticed that one had significantly less loft than the other. Sure enough, one weighed 614g while the other was 660g.
2) In total, I've now tried on three of these jackets and two of them have had main zippers that are extremely hard to work. I'm hoping that the zipper will break in over time. If not, this jacket will be returned.