Been going to Denny's for years during my visits to Miami. Just love the whole American dining experience. I tend to go for breakfast only as they make the best pancakes! A Denny's breakfast fills me up the whole day. Only gripes I have had, on a couple of occasion the service hasn't been great and on one particular day, which happened to be a Saturday, a few customers got fed up waiting to have their order taken at their tables and walked out huffing and puffing. Also as someone else mentioned, the tables seemed to be sticky, so perhaps more attention can be given to cleaning the tables better.
If you own or manage Denny's, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.