With a ton of lunch options in the Uptown area, Matt's Chicago Dog is definitely one of my lunch "go-to" options. It's located off of the Green which is great if you are sitting in a cubicle all day and need some vitamin D.
They keep it pretty simple... dogs and burgers/sandwiches. The menu can be a bit overwhelming with options, but I haven't had a bad sandwich or item here. You come in, fall into line, place your order, and wait for your delicious food to be brought to the table (dining in) or your number to be called out (take out).
The dining space is small and cramp (like everything else in uptown) but they make the most out of the space with plenty of tables, sometimes it's hard to procure a table yourself, but the turn around is quick and you also have the option of taking the food outside on the Green. Pretty interesting mural painted on the wall to make it look like you aren't inside, but outside on the street - props to the artist that can paint glass reflections on the store windows.
OK... I haven't had a chicago dog here (gasp!) but all the rest of the food I have had here has been very solid so I am sure their Chicago dogs are great. It's not Chicago, but it can definitely hold it's own.