I think Kidd Valley's malts are pretty danged good. Definitely better than most, and the milkshakes aren't bad.
I'm a vegetarian, so I haven't tried their burgers, although they do offer a vegetarian option.
However, what I go there for are the french fries. They're good, and they seem to be made from real potatoes, which is nice. They also don't load them down with salt, another plus.
So, if you're going to get fries at a fast-food joint, get 'em at Kidd Vally or Dick's.