Pros:
Atchley Park is a busy community park that is mostly open/lightly wooded with a lot of multi-use space that the disc golf course covers. There is a decent slope to the land so there are some elevation changes to work with despite the lack of trees. The course has one tee/one placement, concrete tees and adequate (if small) tee signs. There is a small clump of woods that holds four holes. The hole lengths are not ridiculously long, but the wind factor on the mostly open course make it a place where strong arms fair better. There is a kooky mound placement on hole 16 to give the course a little character.
Cons:
The park has a walking path that the course throws over repeatedly. Given the heavy use of the park, it creates conflicts with other park users.
Hole four really should not exist. It's a 600'+ shot tight against the property line where a hyzered out drive will go into the neighbors property. The field to the right it used for youth soccer, making the hole unplayable when soccer is going on. Once you make it to the basket, it is set so that being on the edge of Circle 1 can have you trespassing in a neighbors yard. It's just a poorly designed hole.
Three of the wooded shots are under 225'. The other is over 300' but has no route; it's a poke and pray drive into a gauntlet of trees. It's fairly disappointing since the rest of the course is so open.
Hole 14 and 16 throw directly at ballfields with the baskets set close to the outfield fence.
Both hole 5 and hole 14 use a double mando design; in neither case does there appear to be a safety reason so they are there to try to make the course play harder. It seems like if you are going to use a gimmick, maybe you should only do it once?
Otherwise, the shots are a lot of meh. It's a lot of unremarkable, fairly boring disc golf. There really isn't enough tree cover to make it anything else.
The park holds water so a lot of the course on the low (South) side of the park can be swampy. In the summer the lack of shade can be brutal.
Other Thoughts:
In the end, JHMDGC is an OK course that I wouldn't avoid, it's just not a great or good course. It's passable. It was a big upgrade to Boswell Park DGC (the previous course in Lebanon.). If you are in the area, it's a decent course to play. I just wouldn't go out of my way to play it.