I have some good memories of this place. Although I wish there were more to see and more gardens... it's the smallest Japanese Friendship Garden I have ever been to.
I've attended a friends wedding here and it is a nice place to get married.
BUT I've also been kicked out of here for taking portrait photos of a bride and groom that were not getting married in the gardens. They let us pay to get into the gardens and we obviously were with a couple that has just gotten married. They didn't tell us we couldn't shoot in there. I had just spent ten minutes setting up the perfect pinhole image and the director told us we had to either pay $100 per hour to use the grounds or we had to leave. She didn't even let me finish my photo, and then escorted us out.
So for that it gets 3 stars. It's definitely not worth $100 per hour to use the grounds. There are only two good spots to shoot. I'd gladly pay the entrance fee but not more.