For some reason I find it incredibly difficult to find a good sandwich in this town - its either Subway or a sit-down restaurant so I was thrilled when I found Sacks... a happy medium. It's perfect for a midweek sandwich with coworkers. Its a no-frills restaurant... don't go expecting to be wowed by the interior or "vibe" of the place, but rather a quick and tasty sandwich. My personal favorite is the Sack's Symphony with added honey mustard. My girlfriend always gets the Mona with salmon. Bonus - every order comes with a chocolate chip cookie.
Note - during the lunch hour it can get busy and loud. We like to order ahead and skip the line by hitting up the "to go" counter.