This is the best dog park I can remember visiting. This is based on the size, the other dogs/owners in attendance, and the varied areas.
The park features wide open grass areas, a couple areas of high grass, a forested area, and a separate area for little dogs. The park itself is pretty good sized, maybe 1/2 mile in circumference if you walk the fence (as many folks do). It should be noted that there are many more bully breed dogs on Saturday and Sunday afternoons than other times. I dont have anything against these breeds per se, but they do play a little too rough for some dogs.
There are very few inconsiderate people at this dog park, which I think is what makes it such a good one, but you'd still be wise to watch your step and keep a close eye on your dog. I know my little gremlin loves to come here, and I'm usually able to strike up a convo w/ somebody interesting.