DH and I went here after I got sucked in by the Mt. Olympus burger commercials on TV. Neither of us had been to one before, so we figured we might as well try it out.
Our experience was good - we had a good waitress who was attentive. She knew when to bring refills, when to stay away, and was a psychic when it came to knowing when my hubby needed napkins.
I also want to mention the experience of a couple sitting nearby. She had ordered a turkey burger and did not find it to her liking. They offered to bring something else out to her immediately, for free. They also offered to keep refilling her fries - for free. They offered her a free dessert, a free shake - free ANYTHING. The waitress and then the manager.
I have seen some negative reviews about the customer service at this place - so I just want to mention: If something bothers you, mention it. I would be willing to bet they fix it. Immediately.
We both enjoyed our food, had a pleasant dining experience, and got to overhear how we would have been treated had we not been happy. Solid 4-star experience.