I ate breakfast at Cafe Fiesta this morning. The Denver Omelette was hot, fresh and tasty. The hash browns were hot and crispy as I asked them to be. The staff is very attentive, friendly and is clearly professional.
For $11 I got the aforementioned omelette and endless coffee: reasonable. I was full after that meal. Unless you're very hungry, I would recommend the Cafe over the Fiesta buffet (on the second floor): the Cafe's food quality is much better, the atmosphere more pleasant and the staff more seasoned.