I've used this jacket on a total of 14 days worth of Olympic rainy days in the mountains. If you take care to protect the openings - the wrist cuff, hood, pit zips - you will remain dry, even while plowing through brush. The caveat to that is you will remain dry for probably a day or so of prolonged, Washington rainforest style rain. During my 5 day High Buck hunt, there was one day of torrential rain followed by 3 days of light rain. The only issues I had keeping dry during that hunt came from not protecting the cuff and hood openings. During my 9 day elk hunt, I had to cycle between several rain jackets. This isn't a reflection on the Seak as I doubt anything shy of a full rubber suit would have kept me dry with the weather we had this year. However, be aware that there is no silver bullet with real PNW rains. I've owned GoreTex jackets my entire life and I've got to say I may be drinking the Kool Aid on 37.5. Its drying time is ridiculous. I did several experiments during my elk hunt: I left the jacket in my car one night to dry, on the ground under my hammock/tarp another night and did the same with an army issue winter gore tex jacket and two Arc'Teryx Beta SLs. No matter where I left the Seak, it dried. The three GoreTex jackets I always woke up to them still being soaked. From the descriptions of how 37.5 is supposed to work, heat (conduction) should be the best way to dry it, but I found that airflow (convection) was vastly better at drying it out. Around 30 minutes of glassing in the wind dried it faster than walking up and down the mountains all day long. Its abrasion resistance is decent, but stay out of vines - blackberries in particular. If First Lite allowed pictures in their reviews, I would post some of the scratch damage. Once again, not really a jab at the Seak as I pushed it to the absolute limit to see what it was capable of, but something to be aware of. It's heavy duty, but you still need to take care of it.
Overall, I highly recommend the Seak. In 103 miles, 52,000' of elevation change over 14 days - largely bushwacking - in late September and mid November on the Olympic Peninsula, I have had a chance to put it through its paces and I am highly satisfied with the performance. I love how quickly it dries and the durability exceeds any GoreTex shell I own. 92/100