I can NOT recommend my Showers Pass jacket after this morning. I've only had the jacket a month and this was the first ride when rain was coming down pretty steady the whole time. Also might have been the first time I was wearing regular street clothes underneath (normally I am headed to the gym first thing in the morning and tend to wear more technical fabrics). Wasn't on the bike long at all, maybe 6 miles? Started to notice my arms felt a lot colder than normal. Couple miles later got to my destination and took off my jacket, and sure enough, my long-sleeve cotton shirt felt damp. Definitely not sweat (was mostly my forearm area).
It's disappointing since I live in the PNW and of course the rain is a regular visitor. I still like the jacket for the visibility it provides, and I will probably try to wash it in Nikwax to see if it works better then.