Pros:
Very well marked holes and clear tees. Great flow, as each hole easily goes to the next (though the walk from 8 to 9 seems a bit contrived). Big elevation changes, which is unusual for this area. Holes 6-9 have very well built stairs which is definitely necessary. This is a very challenging short course, as it requires a great variety of shots. Narrow fairways and very wooded, but even so, there is pretty good visibility. Losing a disc is possible, but there's always a good chance you can find it. A very pretty course, it doesn't feel like you're playing on a course off a major road. Even though holes 6 and 7 play along Campton Hills Road, it's barely noticeable - just a very peaceful, serene looking course. This is a well built and well maintained course - I played the Monday after the big rain and flooding a couple weeks back and the park district was finishing up some maintenance on the course. A day or two after all the flooding, this course was very playable, save for some mud on holes 7 and 8.
**Update - 7/12/2009** On the 7th and 8th holes, they've added makeshift stairs on some of the more treacherous inclined areas. It makes it easier to get to discs on those inclines and it's easier to get to the basket. A very nice addition to this course.
Cons:
I'll agree with Dave in saying that the tee boxes are too short. I don't have an issue with it, but I've definitely heard the same complaints. I can see how it would be a bother. Definitely a short course, but the challenge provided should make you totally forget about the length. Be careful with your shots, there can be some potentially dangerous and unplayable lies on the hilled portions. The course can also get very busy, and the litter can be bothersome as well. I wish people would use garbage cans instead of leaving cans and broken bottles all over the course.
Other Thoughts:
This is a tremendous place to play, and is great to have as a hometown course. The only really comparable course in the area is Oswego, but this is a very good 9-hole complement to that course. This is just such a nice course, with the pros most definitely outweighing the cons. This course is great for all disc golf players, and you should really go out of your way to check it out. It's also close enough to Oswego and Aurora where you could check those courses out in the same day (it's also close to South Elgin and Bartlett, but I would go ahead and avoid those courses). Overall, one of my favorite courses and one I would recommend to all.