Great park! This is the biggest dog park I've ever seen. The park is split up into four sections, and each one is fenced off. I take Hagrid, my boxer mastiff mix pup, here all the time. If you're in a section that may get a little crowded or the other dogs play a little to rough for your liking it's easy to move to another section. There is also an unofficial small dog area. I say unofficial because it's not really labeled; most of the regulars know not to bring our big dogs in there.
The park is always clean when I go there and they provide poop bags and water stations for the dogs. Also they're open late! Because of the Las Vegas Summer I refuse to take Hagrid out in that heat during the day time, but when the sun comes down and it cools down a bit you'll see him running around.