Pros:
-Fantastic variety of shots required
-Holes vary from 160' to 550' so there is something for everyone
-Good use of the woods as about half the course winds through the woods
-Decent enough signs at each hole (except #9 was missing)
-Nice long tee off boxes that were in decent shape
-Porta potty on site (as well as a picnic area)
-Park is more or less solely for disc golf and it's big
Cons:
-Litter is a big problem here, I came across broken glass on nearly every hole
-The sign was missing from hole 9
-Navigation between holes was somewhat confusing between 3 & 4, 8 & 9, and 11 & 12. At least an arrow pointing which way to go would be helpful.
Other Thoughts:
I really would like to give this course an even better rating as the layout, difficulty, and variance of the holes was atypical; especially for a free course. The thing that is holding me to a 3.5 for Oakwood is that it is in need of some upkeep rather badly. There is a terrible litter problem everywhere, which is even more boggling when you consider that there are numerous garbage receptacles throughout the course. Also, the grass was very long in the open section of the course making finding a disc a challenge sometimes even if it was thrown down the middle of the hole. The holes that wind through the woods require just about every kind of shot you can throw. You must have good technical skills and be able to hit your spots or you will post awful scores on a few of the holes. It is evident that the course is well worn and older in the woods sections as there isn't all that much underbrush; but this is good as there is enough of it in the open sections to make up for it. The baskets are in need of some help sooner or later as well, the labels are worn off on some of them and some of them have rims that are a little bent up. With some TLC regarding the baskets, litter, signage, and mowing in the open areas this course would be a 4.5 in my book. If you don't care if a course is well kept when you play it and you just want a good layout with some challenge, this is a perfect course for you as I'd give it a 4.5. If you care about all the other things I mentioned, consider it a 3.5. All this said, I will come back when I'm in the mood for more of a challenge.
EDIT 11/18/12: I don't know when they were put in, but there are huge numbered signs attached to each basket now and next tee arrows as well. These two things are extremely helpful. These are a couple of big upgrades which are enough for me to up my rating to 4.0.