Well, I specifically visited Johnny Rockets at the Aliante because I was in the area and craving a diet cherry cola. I should have just gone to Sonic and saved my money.
For a little under $16, I purchased a chicken club, onion ring/fries combo, and a diet cherry cola. The chicken was cooked fine but the bacon was burned (rather than crispy) and the sandwich was just a bit tasteless. I had the same tastelessness with the onion rings & fries. There was definitely a lack of seasoning. As for the diet cherry cola that I was craving - what an utter disappointment. I actually had them add extra cherry and still could not taste it. Needless to say, my lunch was not worth the money I spent and I will not be returning to Johnny Rockets.
I can tell you that TGI Fridays makes an excellent diet cherry coke. Too bad I have not been able to find a location with adequate service.