I did this last June and I think its worth the money if you are a large family that goes out for breakfast a lot, and if you plan on coming back to the room for the appy time.
We are a family of 5 and did the concierge for 3 nights and ate breakfast and dinner in the lounge every day. The appy time was sufficient for us to count as dinner.
If you are a small family and plan to eat in the parks, its not worth it financially.
The lounge is nice and we got some perks (balloons, photos, rice krispie squares the first night), but it wouldn't be worth the money to us if we didn't plan on eating there the whole time.
I probably won't do it again as I like to eat in the parks, or I might do it for a couple of nights of my trip only.