Pros:
A lengthy, mostly open course with several multi-shot holes and a prominent lake.
-Amenities: Numbered DISCatchers, many with colored next tee spokes, and good turf tee pads. One practice basket. Also, the freshest and cleanest port-a-potty I've ever seen.
-Terrain: A good mix at Green Valley. There are gentle hills that come into play fairly frequently. Many holes are bounded by thick brush, others are very open, and larger trees figure on several holes. Most notably, five holes play around/over two bodies of water, a large lake and a smaller but still substantial pond.
-Shot Shaping/Gameplay: Quite considerable. The first seven holes or so are mostly par 3's, moderately tight, and use trees to force certain kinds of plays. For example, (2) is somewhat open but due to the layout of trees requires a straight midrange, (4) is a shorter par 4 that gently curves left into thick trees, and (5) is a super cool right-to-left s-shape fairway playing with some weird hill contours.
The personality of the course changes in the next 6 holes, the lake region of the course. It's mostly more open, but scarier. (8) is the par-5, which can be accomplished by going around the shore but will require a big water clear to cut off distance and shave strokes. This region features two more water carries in the 200'-250' range (including (11) with a sloped green, guarded basket, and drop zone), a short downhill run straight towards the lake, and a brief interlude with (10), the woodiest hole on the course.
I would call the last five holes the open part of the course. There are some factors adding interest, like hills, a plethora of tiny mounds on (14), the very difficult to access wooded green on the par 4 (17), and one more uphill water carry to close things out on (18).
Overall, the variety is very good. With three par 4's and one par 5 there are a few multi-shot plays to maintain interest, the water carries add beauty, fear, and strategy, hills are a considerable flavor, and some of the greens are a tricky pleasure to access.
Cons:
Green Valley is very rough around the edges.
-Tee Signs: The tee signs were missing or disintegrating, and even the ones that were around only had hole number. I consulted UDisc on almost every hole for both shape and distance information.
-Navigation: Again, UDisc was essential. There are several longer walks where the direction of the next tee isn't obvious from the terrain. Green Valley really needs both tee signs and next tee markers.
-Grass: The grass was knee-high on my appearance. Talking to locals, this is a routine state of affairs. By the time I was done, my legs were coated in either tiny seeds or tiny bugs, I couldn't tell which. I also had difficulty finding a drive in a wide open field a couple of times due to the height.
-Rough: Some of the rough here is truly frightening. Very thick, with sharp branches and thorns. I emerged with small cuts and scrapes on (4), (10), and inside circle 2 on (7), and easily could have had more painful excursions if I'd strayed off other fairways.
-Open Holes: Too many holes that are quite open to my taste. As a low-power player, (8) was just safe drive after safe drive along the shoreline. The (13)-(16) area had very few trees to avoid (though interesting elevation), and (3) was also mundane.
-Exposure: I played on a July day, and it was a slog. Sun and wind can both beat on you with full force in many parts of the course.
-Lost Disc Potential: Very high here. I splashed 4 discs and was able to retrieve two of them. There are quite a few long branches around the lakes for (11)-(12) and (18).
-Infrastructure: If this course gets popular, parking will be a huge issue. The course begins to the side of a dead end road and has no dedicated parking and no cul de sac. There's not even a sign to indicate the name of the course, just a small pointer towards the practice basket.
Other Thoughts:
Green Valley has a nice variety of styles--open holes, woods holes, and some in between with lots of small features. For those who like playing with water on a mainly open course with a few patches of rough, this will be a go-to course. Getting through the course can be a challenge, though, with no signage, scary rough, possible fishing for discs, and overly tall grass. I think for the pure sport of disc throwing Green Valley qualifies as Very Good, and it's a nice asset to the impressive course portfolio of Griffin.