Harvey's was the first hamburger joint I ever visited when I arrived in Canada from the UK and I was enthralled. Nowadays, I can safely say their burgers are a reliable option if you're in need of a quick refuelling.
This location is much like the rest of them: clean[ish], prompt and functional. Their fries are still in the top 10% of take-out versions. Being allowed to pick your toppings, right then and there, has always put them one notch above the other chains. I'm a "mustard, onion, tomato and double pickle" guy, personally.