I went yesterday morning (Friday) and Stormy had a blast! There are tons of nice people to meet. The park is basically a big grassy area and a chunk is blocked off for little dogs. There's a double entrance gate... Left for the big park and right for the small park.
There's a big water fountain and buckets full of water. Everyone I saw there picked up the poop. Tennis balls are all over to use.
I've also been to Cosmo. If you prefer a calmer, more one on one kind of place, Countryside is for you!