Pros:
The course is well-maintained and very well designed. Of the 21 established holes, none are impossibly difficult or boringly simple. For average players, many holes can provide a three-shot scoring separation. Every hole (even the intimidatingly wooded 15) has its line, but some can take a while to decipher, adding to the challenge and enjoyment of the course.
All of the mundane things like signage and tee pads are in good order. The park store sells discs, and more importantly, ice cream.
Cons:
Of the three new holes, AB&C, A and B are currently a real chore to play.
A was originally an acute dogleg right with the approach thick with small trees. A new tee has been established that eliminates the dogleg but that plays across a wet-weather pond and its small dam. There is currently no "fairway" off the tee. One bending sycamore could be removed to provide a shot at clearing the dam to set up the still congested approach, but as it is now, the only option seems to me to be thumber, thumber, squirrely approach, putt. I'm not a fan of the savagery of an overhand throw through foliage, so I hope there is some pruning planned for this hole.
There are two tees for hole B, one is around 100' from a right angle dogleg left, and the other is about 250' from the dogleg. The approach to the basket is full of small trees that take precision to navigate. Because of the ceiling, it is very difficult to drive to the dogleg from the long tee, meaning the second shot is a little toss to the corner to set up a third that weaves through the saplings. This hole too could be improved by the removal of a few branches.
I'm sure that the intent is to let these holes get worked in for a while and see what else needs to be done to them. The problem is that they are currently so miserable that most everyone I see playing the course skips them. It is also possible that some players are unaware of the new holes, since there is no signage pointing them out.
The road and over is OB right on hole 1, but most RHBH players throw over the road to cut the bend in the fairway. This is fine, except that approaching cars are hidden from view until the last second. I've had some close calls here myself, and have started playing this as a backhand roller hole to avoid the road.
What may have been the most goofily designed hole (18, intended to be a 100' to right angle left then 200' corridor between pines) has been overruled by players, who have cut the corner until a sensible fairway has emerged. The only problem with this is that the teepad is angled diagonally to the line of play, and the tee sign is smack in the way of the run-up. I've got a miniature run-up, so I don't care, but I've seen some players fault off the teepad before releasing so they can get their five steps in.
Other Thoughts:
That looks like a lot of cons, but it isn't. The course is otherwise impossible to rightly complain about. Besides being good golf, it is beautifully set and a real pleasure to play. This is a course that must be learned in order to score well, and that rewards a diverse skill set.
If you do play the new holes, be careful on A&B. There are several large honey-locusts and some of these have dropped branches. I got a nice little jolt today when a massive thorn went through my shoe and well into my foot.