Pros:
By a good margin, the best thing I would highlight about this course, and want to applaud the course designers for, is the nice tee pads, baskets and navigation signage. I would say that most Oregon forest courses, at this relative level of quality/age, don't have the consistent signage that I found out at North Eco. The tee pads are grippy rubber, and while they aren't particularly long, they work well for the mostly shorter holes on the course.
There were a few fun hole designs, in particular, the first three holes were quite a lot of fun, as well as the last two holes on the course. I really liked the distance and shot shapes on these tightly wooded holes, providing birdie opportunities for a well-planned and executed tunnel shot, while punishing mistakes with some thick, but not overly dense rough (not counting ground cover). Hole 1 in particular I would highlight as one of my new favorite local wooded holes. It's a perfect width tunnel shot, to a tight, but not overly punitive green.
Generally nice scenery throughout. There were a good number of dog walkers out and about when I played, so it's good the park is getting some use.
Cons:
It's been mentioned in most of these reviews, but the walk from the parking lot to the first tee is very long. The directions here on dgcoursereview list it at about 1/3 a mile, the sign at the parking lot says .4 miles, I measured it on my phone's GPS and got 1/2 half mile, and I think that's likely accurate. It's all concrete too, with views of a large fence bordering a country club and a sewage plant, it's not exactly an enjoyable trek.
I really didn't want to mark down the course too much for the thick rough, as I expected it going in. And, generally, I do think that reviewers often overly punish NW wooded courses for the undergrowth. I don't think we should discourage designers from working with true forest properties, nor do I think that it's necessarily a bad thing to design longer wooded holes that require the use of a spotter. All of this is to preface the fact that unfortunately, the undergrowth at North Eco is bad enough that, playing solo, about half of the holes are essentially unplayable right now. I had to skip holes 4, 5, 10, 11, and 12 just because a perfect drive down the middle could still end up buried in dense undergrowth. Sadly, outside of regular maintenance, the only other thing that could help this issue would be a regular stream of players tamping down the brush, which, due to the plethora of better courses in the area, is not going to happen any time soon. At the minimum, having a spotter on most of the forest holes can help, especially as most of the holes are short enough that placing one spotter halfway to the hole should cover enough eyesight.
The three field holes, while a nice change of pace from the forest holes, are almost featureless, and are all essentially the same distance. I was also unable to find the tee pad for hole 9, and had a hard time finding the pad for hole 8.
This is a small con, but, for a short course, North Eco has pretty long walkouts between holes, which don't couple well with the mile of walking required just to play the course in the first place.
While I appreciate novel hole designs, hole 6 is a bit of an eyesore. No tee pad, and the hole throws up and over a steep ~20 foot high dirt wall to a hidden and protected pin.
Other Thoughts:
North Eco is a bit of a tough course to rate for me. I have a lot of respect for the moxie of the course designers to carve a course out of some fairly unforgiving terrain. I think that as a solo experience, given that even as an experienced, ~930 rated player I only felt comfortable throwing 7 of the holes, I would say that North Eco was a 1-disc sort of experience. Playing this course with a group of friends might be more like a 2-disc experience, though if I was playing with a group, I would likely take my friends out to one of the better courses in the area. I would strongly recommend avoiding this course, unless you are a true course bagger, unless you bring someone to share in spotting duties throughout the course.