Luke's has the best Italian beef I've ever had. I've been going here for almost 20 years (geez, I'm getting old!) and it's always great quality, piping hot and spicy hot if you get it with the hot pepper mix --which is uniformly HOT. I love this stuff. Jalapenos, celery and other veggies pickled into atomic flavor bombs. If you don't like hot jalapenos, you may want to pick another topping option. The beef is always tender and I've never had a gristly or fatty piece. The bread is good stuff--they get it from a local bakery and it's perfect. The fries are crinkly cut and yummy --if they cook them long enough (hate it when the fries aren't crisp --and these can be soggy if they pull them out of the fryer too soon). They have diet RC on tap and unlike other places, they have a good syrup to soda proportion instead of cheaping out so it tastes like soda should--not just like fizzy Phoenix tap water.
The sandwiches might seem a little pricey compared to other places, but they're totally worth it --and if you read my other reviews, you know that I have a very sensitive price to value ratio, so that's high praise coming from me.