Pros:
Most of the tees and baskets are nearby so not a lot of walking between holes. You have to backtrack a bit if you play the green baskets but it's not far.
The course has been cleaned up a lot in the past year, with most of the fairways in the woods now covered with mulch. The 4 holes with longer baskets (the greens) are now always well maintained.
Most of the woods corridors are wide enough now to be realistic. A lot of brush is gone and the valley where 4 and 5 are located is much wider. The hillsides where 4 and 7 long tees are located have been totally cleared out and very playable now.
There are several enjoyable and exciting tee shots through the woods or down a hill
As much as I hate the island green 2nd hole, I love the island green 2nd hole. (It's always into the wind!)
Forces you to be able to work shots in both directions in order to be successful.
The addition of 4 longer baskets on some holes make the course more interesting. Especially #13 which goes from a shortish par 4 in the woods, to a pretty difficult par 5 with the last 200 or so feet in an open field.
The township is really doing a great job these days keeping the corridors open
There are no water hazards!
Cons:
Some of the hills are very steep and sometimes slippery ,but they do make the course challenging and fun. You'd probably better walk down 10 fairway to get to 9 basket, 9 hillside is steep and slick.
#12 is probably the least enjoyable hole on the course, but it is slightly less of a plinko type hole than it used to be. There is a narrow line that has opened up for a right to left curving shot. It's not much wider than the tee pad though.
Can be difficult to play in the summer because the undergrowth can get pretty high but a lot of that has been removed. I've never lost a disc here but there have been a few 20-minute searches in the summer. (update! I did lose a disc here this past winter, in the leaves. A lot of the brush is cleared out now)
#4 is a wonderful hole, a curving par-3 down a hill and then back up, but the blind tee shot makes it tough to find a disc if you get offline at all. (update: This hole is quite a bit wider now than it used to be, the corridor used to be about 15 feet wide and now it's probably 35)
The woods holes are sometimes used as nature trails by pedestrians, so be forewarned.
There are no water hazards? Maybe?
Other Thoughts:
After opening with a nice friendly downhill open hole, it gets tough fast, and you walk up a steep hillside 3 times in the first 6 holes. You'll need decent shoes. Once you get used to the right lines on the wooded holes, it becomes an enjoyable challenge. It was tough and frustrating when I first started though. But the more you play it, the more of a fun challenge it becomes. The lines start to become visible. It has been cleaned up a lot in the past year, they have nice cement pads, baskets are in good spots, and it's there's usually an obvious path to get to the next tee. Some complain when you come back out of the woods, the last 4 holes are kind of dull, but I find them to be a welcome relief, 15 and 16 anyway. #17 is kind of dull, a wide open shot with really no hazards other than it's 400 feet uphill. #18 is probably the most fun tee shot on the course, downhill and there are some hazards. The park entrance is a bit easy to drive right on by, so follow Google Maps. Once you're there, the first tee is near the pavilion and it's not hard to navigate after that. If you haven't been here before, you'll probably need to walk ahead a bit to see where the hole goes, especially in the woods. There aren't any water hazards but if you get off line in the woods, you really have to keep a close watch on it. Of the 7 courses in the Lebanon area this is probably the most difficult to score on, and that may be why it's not usually busy. Once you get used to it, it's really pleasant, but the first few rounds can be a chore.
As an update, I'm moving this up from 3.5 to 4 stars. They have done a lot of work in the past year to widen some of the narrow corridors a bit and clear out a lot of the rough areas. A lot of the undergrowth is gone and there's a lot less time looking for disc. The 4 holes with longer baskets used to be unplayable, but now you'd never know they were recently added. I'd play all 4 baskets as 1 extra par though, playing 4, 7 and 10 as a par 3 and 13 as a par 4 is painful. Bump them all up 1 and you'll be much happier.
With all the work done on the course in the past year, I think it's a 4.0 now. Sure, they could use a bench or two because it is a tough walk at times, and there are a couple of holes that are just filler, but there are a lot of fun shots, it's well maintained, and it's not hopelessly narrow for the most part. Playing here a lot makes pretty much any other woods course, like Roland Park or Codorus Red or Blue, seem spacious in comparison.
As for the difficulty, the easiest configuration relative to par is to play all yellows, and then the 2 green baskets on #7 and #13, both of which add one to the par. Even par was 917 on that configuration at a recent league night.
Playing all yellow baskets, no greens, is slightly more difficult, even par was rated 920 earlier in the year. The most difficult configuration is to play all yellows and the two greens on #4 and #10, both of which turn difficult par 3s in to crazy difficult par 3s. Even par on that is usually around 930 rated. I haven't seen any rounds yet where all 4 green baskets were in use, but that would probably be around 930 rating at even par.
An 800-rated player would shoot about 12 over, no matter what configuration they play, but it would be an entertaining +12. There are numerous birdie holes here, it's not all a difficult slog. From #7 through #16, it's not unusual to have multiple birdie attempts if you can throw it 200 feet with some accuracy. Even #4 and #5 aren't impossible for the average player to reach as both play quite a bit downhill.