I feel bad for the people who aren't "
DDP savvy" and don't make ADR. We had ADR for Cindy's Castle for dinner one night for two people. There was a couple in front of us (older) who were celebrating their 50th anniversary and wanted to get in for dinner but didn't have a reservation. Of course the host turned them away. We told them to give them our reservation. We ended up going to T-Rex Restaurant.
So, if you're a planner, it's great. If you're spontaneous, stick to the restaurants not offered on the DDP.