Haven't been to the splash park but it is on the same property and it looks really nice. good ground too (the squishy stuff instead of pavement). We have gone to the adjacent playgrounds often. I like that there are two different playgrounds depending on the age of your child. There are also fields there and public restrooms which is a must. looks like in the winter there is a good sledding hill too.
I love this little splash park. There's a nice playground just outside of it that you can have the kids play in before the water area opens in the morning. It's only $2 a kid. The parents are pretty laid back to about kids sharing eachother's buckets and other water toys they might bring with. Just make sure you label your own buckets and stuff cuz it can get confusing when there's a ton of kids. There's a concession stand area, bathrooms closeby, and some picnic benches right outside the splash area, which is all rubber bottom, by the way!