Carm's Cafe is a hidden gem in Concord. I randomly found the place while visiting Concord's amazing antique gift shops. The sandwiches my girlfriend and I ordered were amazing. So amazing that we brought friends back up to Concord with the intent of having lunch there. Once again, the same great quality and great price.
The store itself is very relaxed. Sit where you want, refill your drink yourself at the machine, etc.
If you live in Uptown Charlotte or above I highly recommend making the drive up to Concord to dine here.