Pros:
I have to start with the elevation change. It is intense. There are uphill holes and downhill holes. There are holes along the hillside. There are holes where the tee and basket are both high up but you have to throw across a steep valley in between. All of this elevation change is used well and never starts to feel repetitive.
The pin placement is great, with a variety of hyzers, anhyzers, and straight shots. Many pins are not visible from the tee. Several pins are located on the edge of steep inclines making for a great risk/reward factor. This course is on the shorter side but provides many technical challenges with tight fairways and plenty of trees to contend with on most holes. Most of the throws here aren't wooded tunnel shots, but the hole layouts force you to pick lines around the clusters of trees and brush - and sometimes there is only one line. Did I mention the elevation???
The infrastructure is in great shape here. As some other reviewers have mentioned, the course was renovated a few years back. I never played it when it was a pole hole course but now there are 18 yellow DISCatcher baskets in great condition, plus a practice basket. There are large cement tee pads and color tee signs for each hole showing the distance and path to the basket. There is a map posted at the front of the course and another one at the top of the valley where several tees and baskets kind of converge (the maps are pretty small and can be mistaken for generic signposts from a distance). Even with the maps, most holes have "next tee" signs or it is otherwise clear where the next tee is. You won't get lost on this course.
This portion of the park is disc golf only, so there won't be any other park users to contend with.
It's honestly just a pretty park. Taken as a whole, the course plays up and down a steep valley in a relatively quiet area. From the top of the valley you can see the Grandville Castle in the distance (locals will know what I'm talking about here). Some of the tee pads have nice wooden fronts for decoration. There are also several benches throughout the course to sit down, take a break, and enjoy the view.
Cons:
As mentioned above, the overall length is pretty short. The only hole above 400' is #18, a wide open downhill bomb to end your round. Definitely not a "grip it and rip it" type course.
There are some holes where the fairways are a little close together. The separation distance would be sufficient if the course were flat, but because it's so hilly sometimes the combination of an errant throw and wind can push your disc onto an adjacent fairway.
Some of the holes have so much elevation change that it can start to feel a little treacherous walking up and down the hills. I'm not saying to bring your rock climbing gear, but make sure you wear shoes with good grip and walk carefully.
Some of the rough is pretty thick. It isn't particularly unpleasant to search in, but it's still possible to lose a disc.
Other Thoughts:
My favorite hole is #13. It's short (194') but angles sharply to the right through thick trees, and steeply downhill (so much so that you have to walk down some switchbacks to get to the pin from the tee). This is one of the tightest holes on the course along with #12. If you can avoid the trees and get the right flight path it's probably an easy birdie, but I haven't managed it yet. Some may feel this is a poke and hope hole, but I enjoy trying to thread the needle downhill at the basket.
With the recent improvements this course is significantly better than the ~3.0 average rating it currently holds on here. This is a must-play course if you are local or visiting the area. I wouldn't quite call it a destination course, but there is no other course within a 20 min drive of Grand Rapids that offers this much elevation change and arguably none that offers this much technical challenge. Play it!
Update 7/2021: I noticed there were no photos here since the redesign and added some (forgot to take 7 of them though, oops). This is still one of my favorite courses in the Grand Rapids area. The rough is definitely pretty thick though, and the course can be very buggy in the summer as well -plan accordingly. No change in my rating.