I needed rain gear for a 240mi Durango to Moab 7 day ride and purchased this after reading tons of reviews on many different jackets. I knew I wanted a gore-tex (or similar) jacket to ensure waterproofness, and I was hoping to find a bike specific design.
This jacket performed BETTER than expected. It was super small and light-weight when rolled up in my backpack which made me very happy.
The last 2 days of our ride it was a complete downpour in 48 degree temps...the same rainstorm that later flooded Colorado after hitting us in the La Sal's outside Moab.
I was dreading riding in rain gear with fear of getting soaked and/or overheated inside the confined shell. To my surprise the gore-tex worked as advertised. Even though I was sweating and riding fairly hard I never felt wet on the inside, so it must have been breathing. The rain never penetrated the jacket and I was able to maintain a good riding temperature despite the conditions.
I'm really impressed with the latest generation of Gore-tex Active and I plan on buying the matching pants now!
Oh, and I agree with the difficult zipper comments, it's hard to get it started, but hey it was waterproof so I'll put up with a difficult zipper!