We went in October, right after Oso arrived, and loved it! Our DD was in heaven, and watching her dance and have so much fun was one of the highlights of the trip for us.
Our ADR was at 8:05, I believe. They didn't actually allow anyone through the park turnstiles until 8 a.m., then we had to go back to the restaurant, get checked in and wait to be seated for a couple minutes. The great thing about this was that the characters were greeting everyone in the lobby. Oso played peek-a-boo through the window blinds with my DD. The downside was that it was closer to 8:15 by the time we were seated, and DD is a slow eater, so with the character greetings, we weren't done by 9. However, we were wrapping up, so DH left and got Fastpasses for TSM shortly after 9 and I finished up with DD and paid the bill.
We were very happy with the food and the experience, though. We'll be doing it again on our next trip.