We have done this twice now. The first time was in April 2002 and the place was practically desserted. I was able to get my dad seated with us, even though I had only made PS for four. The characters were wonderful, spending lots of time with our two kids.
This time, Monday Aug. 18th, I had PS for ten. The restaurant was very busy. Even though I had PS for ten, they seated us at two tables with enough chairs for eight. Our server was very short with us when taking our orders. We had to go find two extra chairs ourselves. The ice cream was just as good as we had remembered it being, and our kids enjoyed it immensely. The characters all came around to our tables, but didn't spend as much time as they had last year.
I had requested the re-hitching ceremony when I made the PS and reminded the hostess at check-in.
A server came around and asked who was celebrating an anniversary (I had been told you didn't have to be celebrating your anniversary

), I stood up, but my husband looked very confused. The server asked how long we had been married, what two words we had said to each other ten years ago. Then she said some vows and had us kiss to the count of 100.
It wasn't anything like I had read it was supposed to be, no characters present, no certificate, no cake. I was a little disappointed.
We will probably do it again next year though, because the kids really enjoy it. Hopefully it won't be so busy.