Sure the place is a giant gimmick, but its a fun gimmick and for what it is they do it well enough.  The food is what you would expect from a diner and it really isn't bad at all.  My boyfriend loves the shakes, I can't do much ice cream so I haven't had one.  On certain days of the week they have awesome deals for kid's meals.  One other thing that impressed me about 5 & Diner was found on their website.  First they have all of their nutritional information available, but even more impressive is they have a menu for Gluten free choices as well as Lactose free choices.  Very cool in my opinion.