I had one of my worst experiences with any restaurant at the Denny's near Concord Mills mall. When I sat down I had to wait 15-20 minutes for someone to check on me. Mind you I sat right in front of the kitchen. They apologized for the wait and I understood because it was rather busy. The waitress was very kind. I waited for approximately 50 min to an hour for my food. I noticed people who were seated after me or around the the time I got there with food. Needless to say I canceled my order and left after waiting nearly an hour after they to my order.