This is the way.
It's been a while, but the Sub City in Waverly was the bomb.. Meat was stacked 2 inches thick and the toppings were heaped to the max. Not just an amazing sub, but insane value.
Now, best sandwich shop I've been to anywhere? That would have to be Zingerman's deli in Ann Arbor. Prices are insane (for a sandwich) but it really is amazing. Last time was probably 10 years ago and it was close to 20 bucks for a sandwich, chips, and drink. Every time it's like "this better be the best sandwich I've ever had" and it is. It's hard to be an 'institution' at those prices unless the product is that good. And it is.