Pros:
Though Idlewild is the crown jewel, Mt.Airy Park is the home of the Cincinnati Big 3. Come to the end of the drive and visit the Nati pro shop (I'm not advertising or affiliated, just pointing out the type of setup other courses might aspire to), and you'll see the definition of care and dedication to the sport.
Outside the old converted park house is a practice driving area (yes, driving into a net from dedicated strips of concrete allowing you to run up, work on your x-step, etc), an astroturfed, dedicated putting basket, and a second practice basket to work on upshots.
The course itself has extra large teepads, detailed signage, benches, trash receptacles, and new baskets this year. Fairways are always well maintained, and paths are mulched and/or graveled. Bathrooms and shelters are located on a few locations along the path of the course. The rough seems more focused on punishing bad shots than on making your discs disappear (and even if you lose one, this is the most likely place to have a found disc wind up in the box at the pro shop, so check there if you've ever been so unfortunate...)
The folks who keep Mt.Airy one of the best city park courses in the world demonstrate their devotion in the simple things, like constantly improving, expanding, or building better erosion control around a teebox here or there, or regularly moving the basket placements (just stop in the shop and they'll provide a map and scorecard, and let you know that day's configuration). And the locals who play here are mostly very knowledgeable and helpful to newcomers (like me).
Rather than multiple tees, Mt. Airy features many alternate pin positions, and the longs can really increase (boo!) the scores for novice and rec players. I put this in the plus column, because I aspire to compete with intermediate and advanced players, for whom this course is a challenge.
Mt. Airy hosts many tournaments throughout the year, and weekly ace funds and doubles, yet is big enough and challenging enough to minimize having too many casual players, and is therefore seldom overcrowded.
There are a number of memorable holes, starting with #1, which requires a right-bending tee shot over the ridge, an approach into the woods, and a decent putt to hit par (of course I envy those who can deuce this one). #2 goes through a set of guardian trees, across the drive, and over to one of three just-blind pin positions. #3 is a tricky left-turning shot with the only mando on the course. Skipping ahead, #5 is a huge dogleg right that requires power and precision to keep your shots between the tree line and the road. #8 is the most aceable hole, while I enjoy #10 the most (well...it's a downhill beauty!) - with the possible exception of #15, which may be even more magnificent. Come take a look, and decide which you like best. #17 goes long over two ridges and beyond some towering pines. You finish with a long but tightening line back behind the pro shop on #18.
There are Temp holes employed for tournaments, and they even set the course up for a 30 hole birdie bash once or twice a year.
There are still rumors of expansion (even another 18 coming?) in the park.
Cons:
Negatives are few, and difficult to change anyway. The wet season in the fall can cause some of the sloping fairways to be a treacherous walk, but I guess if I'd have thrown my discs where I meant to, I would've been walking on more level ground (gotta try it that way next time it's wet, huh?).
Because of the layout and growth of the course, it's a fairly long walk from #6 basket to #7 tee, and if #11 is in the long position past the creek, there's a considerable hike back up #11's blind fairway to #12's tee. And there is no front nine/ back nine loop: but you're here to play it all, anyway!
Other Thoughts:
Obviously, if you're coming to Cincinnati as a serious disc golfer, you will want to get in a round here.