Pros:
This isn't a memorable course and by no means shoudl you seek it out or travel to it. But man, do I wish it had been there when I lived down the street. Having moved out of the area, I was both excited and infuriated to find out that a course had been put in at the park where I had used regularly for trail running. If this course had been there back then, I would have likely played a round after work 2-3 times a week.
Twin Brook is a fantastic course for working on drives, both in placement and distance control. There are no real obstacles in your extremely open path to the basket so playing frequently will help locals to quickly learn discs and discover exactly what they can do off the tee.
There is some actual distance here so even bombers will get a few chances to air it out. The shorter holes should give them a chance to find out how to land with precise distance.
The best holes on the course are 3 and 7. They are no less open, but they feature nicely angled doglegs, that will force almost anyone to use a long upshot. The first drive of even the experienced player will likely be aimed for the spot at which the fairway doglegs. Both than force significant upshots towards the pin.
It is very much a learner's course, and one that would be excellent for newcomers but it still passes for an excellent practice course for veterans. While there are no trees(at least in the way) there is a variety of distances. (195-540)
Additionally, the upkeep is great. The fields here are regularly mowed, and I'd expect it never to fall into disrepair.
Cons:
But the course isn't a destination and I wouldn't want to lure anyone here thinking it was. There are no signature holes. There are no risk/reward throws. There is no obstacle, tree, water or rough, that should impede throws in the slightest. Experienced players looking for a challenge will be disappointed.
There are also no tees. At least, no paved tees. While the baskets are nice, and new, the tees are spray-painted onto the grass. They are relatively flat, and I'm not bothered by natural tees, but in this case they can be tough to find without a map, and a few of them can be entirely concealed by fallen leaves in autumn.
The major issue, that will likely influence some players' experience on the course, is the amount of times that holes cross areas used for other activities. When I was there, the only issue was dog walkers but soccer games could definitely ruin some of the holes, and I imagine some events would make the course unplayable.
Other Thoughts:
Really, really glad there is a course here. Personally I just wish it had been there a few years ago. I'm sure many will be introduced to the game here, and many local veterans will appreciate a course being installed north of Portland.