Pros:
The course is set in a beautiful park with much of the course winding in and out of the woods. The walk is enjoyable and the creeks running through the park add to the setting. This course presented more technical challenges than the other 2 courses I've played. Bring your short game and a lot of patience. As others have said, it might be worth a try if you're in the area. Though I probably wouldn't go out of my way to play here again.
Cons:
To start, I played on a Saturday. If you play this course, try a weekday. The park was really crowded with joggers, walkers, dogs, baseball teams, horses, etc.
I had a difficult time finding the tee box for hole #1. I saw the pin, but never found the tee box. So I started with hole #2. I almost hit a horse on hole #3, so I just decided to start playing at hole #5 and go from there (Equestrian Center was packed too). The course flows pretty well from there.
Pack a lunch for the walk from #11 to #12. Good Luck on hole #12.
The condition of the course was tolerable. Tee boxes are fairly well marked, but there are no tee pads to speak of. Some of the baskets are showing age, but at least they're all there.
Pedestrian traffic would probably be the only thing that really annoyed me. The layout of the course puts pedestrians in danger at times. I haven't hit anybody with a disc yet, but it wouldn't surprise me if that happened here.
Other Thoughts:
This was my first trip to Wills Park. I'm fairly new to disc golf, and I have enjoyed playing at some of the parks around the metro area. But in my opinion, this course was a little disappointing.
The walk through the park is very nice, but this course would be best experienced on a weekday when traffic is minimal.