Pros:
To me, this is the best course in the area. There's significant elevation change as the park is higher ground roughly bisected by a low creek. Holes mostly play across the creek or parallel to get the most of the slopes. The course is mostly open, but it can be deceptive. Because it's also pretty long for intermediate players, there's a lot of positional play that you need to consider to score well. The easiest shot to execute sometimes puts you in the worst approach position. On #7, you cross the creek at an angle between two trees, then go up a hill protected by trees to the basket. An easy hyzer fits the gap best, but leaves a tough approach over the trees to the left. The holes can make you pay without heavy rough that eats discs - this is a mark of a good course for me. Being more open, wind factors more heavily on this course than other area courses. There are three sets of tees if you know where they are, so it can be a beast of a challenge or pretty accessible for a beginner. There are nice facilities in the nearby tennis center, where you can buy drinks, discs, and use a bathroom. It's a nice park, so you can take the family. As a local knowing the course well, I love how easy it is to jump around or skip a group of holes and come back to them. There are a lot of places where you can skip 2-4 holes and play them when the course naturally brings you back to them.
Cons:
It's a long list of cons, unfortunately. It's a popular multi-use park, and many people are unaware that it's a disc golf course. There's a well-used trail that meanders through the park that's popular with walkers and runners, so it's not uncommon to have to wait on people to clear. Several times I've encountered picnickers who have set up their blanket right in the ideal landing zone. High schools and colleges use the park for cross-country running, so a few days a year you can expect to find an XC meet, and weekday afternoons during the season the course is very crowded with runners. Tee pads are dirt only and worn to a rut, so they'll stay muddy for a bit after a rain. Only the orange tees are used enough to be easily spotted because of the dirt patch - blues and pros are often difficult or impossible to find. If it's your first time here, you'll likely have a really hard time navigating, even with a map. The creek is small but can swallow a disc in a few spots - watch out for #7 and the right side of #16 especially.
Other Thoughts:
As others have mentioned, this is a hard course to rate. The design/layout to me is really well done, and it's a blast to play. After many years of playing all the area courses, Highland is easily my favorite, but it's hard to recommend to others who are used to concrete tees and decent signage. If you're just passing through, I'd recommend Scotlandville LHC instead. If you're a local or have more time to spare, it's worth it to meet up with someone for a round. I'm rating it a 3.5, but it could easily be 4+ with multiple concrete tees and signage.