Pros:
One concrete tee pad per hole, mostly clear and accurate signage, bathroom available nearby (at the playground), and most importantly some solid golf holes both long and short.
Scenic and very representative of the Georgia landscape for visitors from other regions... One of my favorite aspects of disc golf is that good courses immerse you in the regional landscape, giving you a sense of the area in a way that visiting a city in a car can't do. JP Mosely, like nearby Redan and the excellent Perkerson Park, is beautiful and typical of Georgia countryside. Where JP Moseley edges out other top courses is in the sense of being out in the country. It's a different sort of beauty than a city park, enhanced by the fact that I had the massive course mostly to myself early on a Friday morning.
The course starts with a long downhill par 4 that starts open and finishes in the woods, with a specific landing zone you need to hit to set up a birdie approach shot. It's a great beginning to the course, and sets the tone from the start. Most holes on this course have either specific lines (on the -300 foot wooded holes) or highly advantageous landing zones (on the par 5's) which will set up either the birdie putt or put you in the right spot for your next drive and give you a shot at birdie. There are still plenty of choices to make, even on short technical holes, which is refreshing.
The course requires a nice variety of shot, with some holes practically demanding a shot you may not use often. I drove with a forehand on one hole (and definitely could've on others if my forehand were stronger) and a backhand sky roller on another, neither of which I use often off the tee.
The roller was on hole 7, which was a standout for me in its simplicity and difficulty. At the end of a +-400' gradual open downhill, the basket is tucked under the long reach of mature hardwood trees to the right of the fairway. The branches protect the basket from a forehand hyzer bomb, and the basket is too deep for a backhand turnover to reach it under the very low ceiling.. The only way I could figure to get in there was with a roller, and it worked beautifully but felt somewhat lucky considering I never throw that shot... It was nice to be "encouraged" to try something different by the course.
I played the course from whichever tee had the concrete tee pad, which was a bit confusing.. Sometimes it was the blue, gold, or black. I had intended to play the black, but it was early morning and the dew made the grass slippery, so I played the "concrete" layout as I called it. I scored under par both rounds I played, but didn't feel the course was too easy. I think it definitely is the type of course to reward multiple rounds over time, as there are lots of different ways to play the course and score well.
The course takes you through various types of landscape, from tight pine forest, to rolling hills, and back into more sparsely forested holes. The beauty of this is that each landscape requires a different type of shot.
Cons:
Only one concrete tee per hole; signs are sometimes in odd places and at times have inaccurate distances. The course is definitely good enough to warrant a concrete pad for each position. Also, the single pad fluctuated as to which position it was on which was strange. I would expect it to be always on gold, but this wasn't the case. The signs were at times on one tee position but reflected the distance of another position, notably on hole 11. His is an island type hole in an open field, throwing uphill. The sign claims a distance of 263', but as the sign is on the gold tee, it should actually be 303'. This hole being open and without anything clear to gauge the distance by eye is deceiving, and that distance difference is a key one for most intermediate players who can reach 260' on an easy hyzer but would have to change shots and discs entirely to reach 300' uphill. The following hole also has the same problem.. Sign claims 500', but unless I gained super powers right before that hole and lost them right after, it's closer to 375'.
Some holes, notably 11, 12, and 18 are open holes with no obstacles. 11 is an island type hole, basically a putting circle around a basket in an open field that is all OB, 12 a slight downhill, and 18 an uphill shot with a steep decline behind the basket. The rest if the holes are good enough that it's not a huge detractor, but the property is so massive I feel there could be some other solution. Especially for 18.. The course deserves a stellar finish (like at Perkerson) and instead you get blah blah uphill.
Also, some of the tees in the back 9 are just a spray painted line on the walking path that winds through the back part if the course.. Though it is concrete, again, the course deserves better than a spray painted line on a track. It would also help to separate the other uses of the park from the disc golfers to have tees that aren't in the path of joggers.
Other Thoughts:
The course can be extremely hot in the summer, as much of it is in open fields. Prepare accordingly or play early or late. Bring plenty of water; the only supply I found was in the sink at the playground bathroom (ugh). Also, be aware that the closest you come to returning to the parking lot is hole 7.. After that you're committed to a long walk. There are so many covered benches available that this isn't a con, just something to be prepared for.
The rough is mostly playable in the wooded portion of the course, and not so much in the open portion. There are many places where a badly thrown disc is just eaten by the jungle, and I'd say they are mostly avoidable, but wind and over throwing on the long holes can easily make for some errant shots into the woods. If you do wander in after a disc, you'll wish you hadn't worn shorts because of the frequent briars and poison ivy.
Overall, this course is just behind Perkerson Park to me in ranking Atlanta area courses, but absolutely worth the short drive out of the city for a visitor who wants to experience Georgia disc golf. It's near the top of my list to play every time I'm here.