Pros:
Roy G is the perfect course- to me, it is my expectation for a pro-level course. Shot variety galore (BH + FH needed), great mix of Par 3's and 4's of multiple lengths, respectively. Some technical holes, many more open, beautiful holes. Good mix of shade and sun, many holes with good seating.
Roy G was recently trimmed + nearly gutted of all of the debris, long grass and off-fairway hazards (like bamboo). Since then, this course has jumped to a frustratingly disappointing 3.25 to a 4.5, EASY. It design is fabulous, layout very challenging but attackable for intermediate+ levels (difficult, but with great accuracy can be conquerable for lesser skilled players). There are also multiple ways to attempt many of the holes as well as many holes having multiple tee shots. For a player that multiple types of shots in the arsenal, this is heaven for the Austin Metro Area.
It's the best course I have ever played, with La Mirada (Los Angeles Area) and Williamson County DGC (Leander) coming in at 2nd and 3rd.
Cons:
Finding this course and getting to the first tee is very difficult. The bridge that connects to that part of the trail where the course begins is currently closed (and quite gone), so you have to go around a fence, hop down into the river ravine (very little to no water if is hasn't rained very recently), reclimb up to the other side, walk uphill a bit, then find the 1st teebox. Eventually this won't be a problem, as that bridge will eventually be repaired. Don't let it sway you.
Also, Hole #18 is ridiculously far away from where you park. Either you park at #18 and hike all the way to Hole #1, or vice-versa. I feel that most disc-golfers love walking anyways, so it's more of a preferential thing.
There isn't a whole ton of elevation changes. There some, but not enough to be a positive, nor the lack there of be a negative.
It'd be nice to have more trash cans. I feel like there are some bags tied to trees, but I don't really recall a ton of trash. It's also a park with a trail, so outside of disc golf there are going to be some culprits.
It is very long, so often you feel like you're just tossing really hard a lot; however, I like to test my accuracy at distance so it works for me, personally.
If it isn't trimmed/cleaned up and particularly when it's over grown, it can be a NIGHTMARE. As of the beginning of February the course was perfect.
Other Thoughts:
Get out very soon and play while it's manicured. I don't know how frequently it'll happen, so take advantage of it. Bring food/water. Dog friendly, especially if you want to tire them out.