Hidden away in the remnants of The Arcade, Presto is one of the best sandwich shops you can still find downtown. Another one of my go-to lunch joints. It has a local delicatessen feel with vast selection of cleverly-named, fresh sandwiches - unlike your other commercialized options, such as Potbelly, Subway, etc.
My go-to is the Big Mench, a pastrami with Swiss, some slaw and chipotle mayo. It has a little kick to it, but not overbearing. Also the bread they use in this place is amazing.
The people- always super friendly. They usually remember me even if I haven't been there in months. They also have a subway-esque punch card to get a free sandwich, so be sure to pick up one of those, as you will want to go back.