Pros:
Deming Park is a huge park with some gentle hills and old trees. The course here makes excellent use of the land on one edge of the park, without crossing walking trail or the road that loops through. It's easy to see from the road; you'll drive past the whole course and park at hole 1 on one end of the one-way loop.
What I really like about the course is the ample room you have. It plays in a loop on what is kind of narrow piece of land, but it hugs the woods for a while on your way down the loop, and only gets close to the road a couple times on the way back. The fairways are wide enough to be plenty fair, but you have to choose which way to navigate some big trees, hit the gaps way down the fairway, or make the dogleg sometimes. The only rough is the barriers of trees and overgrowth bushes that makes the boundary of the park. If you hyzer out early, or overthrow a basket, you may end up in it but otherwise there's no real risk of ever losing a disc.
There's plenty of up and down hill shots, but not so many you get tired of walking. It's a very natural flow that seems to create a balance where the hole is not just designed that way because of the elevation, but it's just a nice bonus.
The tee pads are concrete. A little small, but they get the job done. Same with the signs- not the prettiest, but they're informative and accurate. I think some holes may have had alternate tees put in, but I could have just been misreading, or misremembering. I'm not putting it in the cons though so don't really worry about it.
Cons:
What I will put in the cons is the baskets. They are these lime green Chainstar-knock-offs. A few of my putts were just barely caught, and honestly I'm surprised I didn't get a ton of spit-throughs. They just look like they can't catch much.
This course seems to have been designed back in the day when everything was a 3. Some of the holes are easy 2's, some challenging 2's, and some very challenging 3's. Like, you need an accurate 450' drive for a 2. I don't mind the "all-par-3" courses, but i think this course would be a little better if they push the 'tweeners forwards or backwards for a clearer par 3 or 4.
Other Thoughts:
There's nothing incredibly outstanding on this course, but also nothing that really stands out as a huge fault. I was very happy to pull over and play this course on my road trip, and honestly kind of want to do it again if I'm ever in the area. It was a fun course.
I also like courses like this, the ones that are clearly more aged in design, because they do carry a sense of the history of the sport and its evolution. If you watch disc golf now, you see courses with monster holes, epic shots, looong holes, OB, water hazards, elevated baskets, and all this extra stuff. I don't mind those when used to augment a course's playing experience, but this is the down-to-earth playing style the sport was planted in and grew out of. Deming Park is like the old wise man of disc golf, it's like playing an N64- yes, we have moved on and things have gotten cleaner, faster, prettier. But it just feels good to always have something old and familiar to go back to, and to remember how we started.