Jack's is a solid lunch choice in terms of the food and I appreciate that it's 7-8 blocks from my office so at least I can feel good about taking a longish walk after ordering a delicious but probably less than health conscious lunch.
It's a chain and despite the New Yorker in the name, don't go expecting Carnegie Deli mountains of pastrami on a sandwich. Instead, you'll get a reasonable portion of good lean pastrami that's been nicely grilled and served with spicy mustard.
My go to sandwich is Jack's Outlaw which us a sub roll stuffed with beef strip steak, pepperoni, salami and banana peppers all grilled along with hot sauce and covered in melted provolone. It's got good heat but not in a too painful way and I love to get cole slaw as the side and just dump it all over the sandwich. Yum!