I've yet to have a bad meal at Mission. I ducked in today for an early lunch, pulled chicken and baked beans. My friend had the brisket sandwich and fries. There is literally nothing I can say that can really add to 122 reviews averaging 4.5 stars, at least not about the food. The meats are very good. The sides are outstanding. The bread/bun the sandwich was on seemed awfully basic, just a hamburger bun but I don't go to a barbecue place looking for a bakery. One really fun thing is picking your sauce. There are six options plus an infused vinegar on the table and also a mustard sauce by the condiments. Choose wisely.
If you've never been there, be prepared for an extremely enthusiastic pro-military and first responders atmosphere. The photos, decorations and staff are very upfront in their support and appreciation. Each time I've been there, there have been uniformed police eating and staff always personally thanks them for doing what they do. And if you are in at noon, everything stops for the National Anthem. It's pretty great if you like that sort of thing.
With drinks and a purchase of two drink cups for a law enforcement charity, lunch for two was $26. ($4 for charity). It's very American and very very good.