Pros:
Fun and quick. If you're a new player or looking to get in a quick round or two on a lunch break or between appointments (or whatever) this is a great course to hit up. The grounds are well maintained and the course does offer some variety. Overall a pretty park and nicely laid out.
This is by far my favorite 9 hole course in the Portland area.
Cons:
Some park goers walking on the paths that intersect or skirt some holes, but not a big issue.
Being this is a popular park, you can sometimes find yourself behind a large group of infrequent/fair-weather players. Typically these groups let you pass, but I've definitely had my run-ins here with those who are new to the sport and don't yet have a handle on etiquette (typically teenagers or Pokemongo players . . . so, teenagers).
Other Thoughts:
Being one of the first courses I've ever played, and definitely the first course that made me feel like I didn't totally suck, this course is held near and dear to my heart.
I still find myself returning here now and again to up my confidence. Cheap therapy : )