Pros:
1) It actually is a full 18 pin course. There is an area separated by a street (pins 3 - 6) that feels disconnected with the rest of the course, but all 18 pins were up when I played.
2) The course does a great deal with little to work with. The design is good and maximizes the space to provide a true 18 pin experience. It's not one of your longer courses, and certainly there are quite a few ace holes (if you can actually control your disc), but it feels and plays longer than it should.
3) The setting is epic. Nestled right in the Columbia River Gorge, the views are spectacular! On the day I played there were clouds flowing down out of the mountains like billowing rivers.
4) It's only 35 minutes or so from Portland, which means that it's just far enough to be off of everyone's radar. I didn't have to wait at a single tee.
5) There is little chance of losing your disc. That being said, I found a lost disc in the river/creek that I wouldn't have expected to come into play.
6) Errant throws are not punished too harshly. You can let the cannons loose and not worry that a wild drive will screw you from at least a bogey.
7) Signage for the most part is good, but it's always wise to bring a map.
Cons:
1) The pins 3 - 6 were far enough from the body of the course that it wiped out any sort of flow for the front 9. Also, these fairways were soaked with standing water from a rainstorm from a couple of days ago. There isn't great drainage on this stretch.
2) There was no tee sign or obvious tee pad for pin #3. I ended up just choosing a spot and throwing...
3) ...except when I waited 10 minutes for the little girl on her bike to get out of the way. This is a pedestrian park, very much so, and it doesn't seem like the locals know much about the hurt that flying pieces of plastic can cause (I couldn't be mad however, she was just waiting for her mom and I'm sure I looked menacing).
4) No concrete tee pads! I never realized how much of my drive is reliant upon the dimensions of a concrete tee pad. I never felt like I could get a good rip off the tee. Also, on wet days these pads probably turn to mud.
5) The layout is somewhat confusing. Finding the basket for #10 was disorienting (but I really liked the hole once I started playing the correct basket). This course is packed into a park that isn't actually that large, and consequently there are areas where crossover occur. This could be a problem if the course is busy, but I suspect this is still too much of a hidden gem to ever get overly crowded.
6) The tee pads for pins #9 and #10 are right next to each other. Leave your stuff after your throw on #9 because you're coming right back.
7) There is a definite lack of elevation, but not all courses need it. You make due with what you've got, and it seems they've got a little wind to compensate.
Other Thoughts:
I really enjoyed this course, so much so that I'll probably be back. This is great practice for the technical game, as many birdie opportunities are available if you can just hit that line. It's a nice round of golf that teaches control through reward for great shots, as opposed to punishment for errant ones.
Concrete tees would help immensely, but the fact that an 18 pin course even exists out there is impressive enough. I will probably make the drive back out, but not on a wet day.