Before eating here, I spent a few hours walking up and down the strip under the oppressive summer heat. It was about 4pm, too early for dinner but too late for lunch, when hunger pangs were starting to kick in. I kicked back at this Denny's, located right across the street from the Mirage.
The food was fresh and portions generous, the waiter was friendly, and the tables were clean.
However, the service was very slow. Not the slowest I've ever had, but 15 minute wait for your soup/salad/appitzer slow.
Bottom Line: Go to Denny's if you want to eat; go to the Mirage or Wynn's buffet if you want to dine.