My experience with Fran's was one of pure mediocrity.
They have a few items that are decently priced and the food isn't terrible by any means, but overall it's simply just not that great and you can find similar food of much higher quality elsewhere. There burger is half decent and their breakfast is acceptable but neither had any wow factor at all, and the fries in particular were horrendous.
I give the place two stars simply because the service was above average, the place is open 24 hours, and the interior has a somewhat unique 1950s look.
Only worth going to if its 5am and everything else is closed.