J.R.A.wrote a review of Marmot PreCip Jacket - Men's on April 2, 2012
As mentioned, a good scenario for using this jacket would be a "just in case" scenario where even light precipitation is expected. Summer backpacking?
I use this on rainy days to get from the car to the front door.
I wore it on a hike in the rain once (Humboldt County rain) and after about 3 hours it was beginning to leak through. I value this as a learning experience, and for my more exposed adventures such as multi-day backpacking I will be purchasing gore-tex.