Yes there are some upsides to it. I have it in my primary puffy, a Brooks Range Mojave. I've tried to keep up with some of the reviewers I respect at BackpackingLight on the dry-down products; it seems the general consensus to date is that it doesn't loft quite as well per ounce, but obviously doesn't give up as much R-value when wet as standard high loft down. It appears that it's as close to middle ground as we might have at the moment. Obviously the higher the fill power of the down, the more performance is lost when wet, by percentage. Anyway, If you learn anything interesting let us know!
