Pros:
Right off I-84, Panthorn Park is very easy to find. The main park is massive and well manicured.
Once you make it to the DG course, the course signs are great. The signs are hand-painted (which shows some dedication) and show tee locations, OB, expected lines (and the locals route), and distance. Further, "Next Tee" signs and arrows are all over the place making it difficult to get lost going from the last basket to the next tee.
The heavily-wooded layout of the course forces a technical approach over a power approach. Most holes have two different tees with shorter, easier lines for rec players. The mix of left-to-right, right-to-left, and tunnel holes in combination with the variety of hole lengths keeps you on your toes and requires a refined skill set.
One signature hole is a < 200' potential ace run with a 12-foot round OB water feature (called the "Hot Tub") within 3 feet of the basket. The layout of the fairway and OB on this hole really pushes the risk vs. reward aspect of the game.
The vast majority of the baskets and tee pads were in great shape.
Cons:
Park signage pointing to the DG course would helpful for anyone that hasn't played Panthorn.
Panthorn is easy to get to because it's right off of I-84, but the disc golf course is right next to the highway. The highway can be heard the entire time you're on the course. The danger to motorists is of concern as there are a few holes where it's entirely possible for an errant throw to drop a disc on the thruway.
Although the hole lengths and layouts change, there are nearly zero elevation changes. Panthorn Park itself has numerous hills, but these were not incorporated into the course design (might not have been able to use this land for DG though).
Having an almost entirely wooded course is great for fine-tuning controlled throws, but the lack of any real wide-open spaces to uncork a disc is a detracting factor to the course overall.
There were numerous fairways where the adjacent rough/brush could be trimmed back.
By far though, the biggest drawback to the course is the ground underfoot. The course appears to be built on a bog. Most holes were swamp-like, sloppy, and extremely/excessively muddy. Just when we really started to really have fun on the course, the muck could come into play and act as a big buzz kill. Luckily, it was cold enough that the insects hadn't come out, but I'm almost positive that mosquitoes are a major problem during the warmer months. To give the local DG community credit, over some of the most seriously messed up trails/fairways, there were objects that you could step on to cross the bog. Unfortunately those were few and far between and a large portion of these planks, logs, and pieces of fence were half buried in the mud.
On several of the holes throughout the course there was a fair amount of litter that took away from the natural wooded beauty of the course.
Other Thoughts:
I really, really want to like this course. If the some of the underbrush could be cut back, it would be a big help. If something, anything, could be done to help mitigate the muddy mess throughout the rest of the course, I would be happy to rate this course a 4.
The next time I'm in the area, I'd like to play Panthorn Park again, however, it's going to have to be pretty dry month before of my round.