Pros:
Beautiful city park that's always well groomed, has nice/clean restrooms, water fountains, and a small water park for kids. The City of Rockwall puts a lot of man hours into keeping this park clean, and the large number of people there on an average weekend shows the results of those efforts.
The course was designed by John Houck, so you know it's going to be challenging...and hole 1 starts off with a big challenge. The basket for this hole sits on a steep incline leading to a small creek - very beautiful, but treacherous. Holes 2 and 3 are long (#3 is the definition of "epic"), 4 - 8 are all short/tight/technical midrange distance shots. Hole 9 offers another big challenge with its tight, up-and-down, winding tunnel lined with thick woods leading up to an elevated basket. Holes 10-11 are mostly flat with some very slight elevation changes, but both have narrow fairways lined with trees. 12-15 are all birdieable, and although each is unique, these feel a little like "filler" holes compared to the signature holes early on. 16 is another bomber - uphill through a fairway dotted with evergreen trees with OB fence on the left. 17 is a giant, wide-open par 5 that utilizes an imaginary OB line marked by a series of trees...pretty difficult from the long tees, but a little gimmicky to me. 18 is a simple hyzer with another sloped green, this time heading towards thick underbrush.
All in all the design is very challenging from both sets of tees...though the longs do offer significantly more challenge on most holes. Houck did a great job of utilizing all the unique landscape features in the park, and most of the holes really make you think before you throw.
New Discatchers on every hole, most have 2 sets of tees (all concrete), and each tee has a very nice sign.
Cons:
Many of the holes will probably be overwhelming for new players.
The sign for #3 makes it looks lot shorter than it actuall is, which confused me the first time through. Also, the walk from Hole 8 to Hole 9 crosses the fairway for Hole 3...though the area is open enough that being hit isn't really a concern.
Some of the schule is very thick and difficult to recover from - for me, this isn't necessarilly a con but to some it could be.
I've heard some complaints about the wind at this park...but personally I've never felt it was stronger here than anywhere else in Rockwall. In my opinion, wind is a part of the game...so you just have to deal with it.
Other Thoughts:
The first time I played Harry Myers I was blown away...it offers some truly unique holes: 1,2,3,9....especially 3 (I could play that hole all day). After playing several more rounds, I realized that some of the holes pale in comparison to the others. Should Houck have "toned down" the signature holes to make the others seem better? Absolutely not! The signature holes make this course...and the rest are all very solid, just don't make me feel any excitement like the others.
From what I've heard, the City of Rockwall has been very pleased with the course and is already making plans for more. Considering the amount of resources they have available, Rockwall could really make a name for itself in the Disc Golf community with more courses like Harry Myers DGC.