We don't use the dining plan but love The Plaza. Simple, well prepared food. The club is huge and 4 of us share 2 of them. They even split it in the kitchen for us. I have an allergy and the chef has been very friendly towards our family and never minds when we have special request. We have had the grilled chicken and grilled cheeses as well (they will make an adult grilled cheese) it was all good.
The service is slow and spotty so be prepared for that aspect. Also, while we love the brownie sundae on occasion they have been hard. The waiter has either replaced or removed it from our bill without having to ask when he noticed we could not eat it.