As a coach on the water every day we do get caught in pop-up showers here in the SE USA.  I needed a new shell to help with all the rain we've been getting and saw this.
First time we got hit with a pretty decent rain I used this.  Works as expected though skin felt like I was getting slightly damp, when in reality I was kept dry.
Some of the comments on it zippering from the reverse side; this is common in many overseas nations and it not a big deal if you are used to it.