Dennys breakfast is great and well priced. It is ok quality and the same you will get and any typical chain restaurant that serves breakfast.
I go to the one by LAX on Century all the time before early morning flights since the food sucks in T7 at LAX.
I like looking at the different types of people who are there. all kinds, business people, backpackers, and night shift workers.
I wont eat at dennys though for lunch or dinner but have been there after a late night on the town