Rush Espresso is in the former "Dilworth Coffee" location in Ballantyne Village. They've given the space a more modern look since Dilworth Coffee moved out.
They give you the option of either having your coffee drink in a mug (if you're staying there to enjoy) or in the now traditional to all coffee purveyors, the cardboard cup. I personally enjoy being able to get my coffee in a mug since it seems a lot less common at most coffee shops.
In terms of the actual coffee, they use "illy" coffee and of the half dozen visits I've had to "Rush Espresso", the coffee has been great!
I'd definitely recommend them.