Pros: 19 oz.? this weighs NOTHING
Cons: Price. Gulp. Not cheap but..worth it.
Like with high end bikes, the more you spend, the less you get. The Patagonia's halo PowSlayer is no different, this is is one lightweight tremendously technical shell. The 3-layer Gore-Tex Pro shell is fully seam sealed and very breathable, The sizing is very accurate, I am 5'10"190lb and the Medium fits me perfect, I am not a "Large" and with many manufacturers I need to wear a large. The fit over the shoulders and through the chest area are perfect with a 200 weight base and a medium mid layer. The pocket design and placement is what you would expect from a ultra performance shell of this caliber, not too many to weigh you down or overload and very well placed for easy access.
Patagonia didn't forget anything when they designed this shell, including the extreme environment that this shell is designed to perform to it's max. I am looking forward to the next Tahoe 4-6" an hour storm so I can put the 'Slayer through its full paces.
12/12/12 Update: Today, these pants lived up to their name, and they slayed the powder at Alpine Meadows. The winds were blowing and it was snowing a good 2" an hour at times and along with an Patagonia R2 base layers and a Patagonia NanoPuff, I was dry and warm in the weather that we had. Again, I have the utmost respect for Patagonia not pulling any punches when they designed the PowSlayer line. I increased my "value" score from 4 to 5 stars.
Please also check out my review for the PowSlayer pant.