We did the Holiday Dine last Dec. It should be book able at 180 days, last yr. was the first yr., and it did not get announced until Aug., but now that it is yr. round, with different themes each season, it is a regular meal. The characters dress is fabulous, and the interaction was great, some of the best we've had. It was actually must better than our brft at TH this trip, where the characters seemed rushed, took a quick pic, and other than Goofy did not do any silly antics, etc. There is also no longer the picture outside at TH, which we did not realize, as it was part of the reason we chose the memory maker, since it was on the list , and we had gotten a nice family photo there last trip. It was not even packed, so no reason to rush, so while the food(and special juice) were great, we were disappointed.
We got the pic with Santa Goofy on the way in, and then had Mickey, Minnie, Donald, and Daisy inside. They danced around with some people, Daisy sat down and batted her eyes and flirted with a gentleman next to us whose wife was up at the buffet, and Mickey and Minnie noticed DD and my Mickey Christmas shirts, even trying to hear my DD's shirt which played music(hard to hear with music and talking). The waitress was great, and the food was just okay, which we figured, as we had never eaten there before because of the reputation, but we wanted to try it for the holiday experience. I loved the sweet potato casserole, and they had a lot of cute mini desserts. We did have
free dining, so I didn't have to think about the price. But if you think about it as being for the characters, I would do it once. We did have an early dinner, around 4:30, so it was not busy yet, so that may have helped, so you might aim for that.