So! Fun fact! If you do the survey on the bottom of the receipt, they'll honor it as a coupon for a free medium coffee. Hot or cold. Boom! They don't usually give you a receipt for it, but if you want another receipt, you can order two munchkins for $.55 including tax! Try a mix of caramel and mocha swirl! Sooooo yummy!
Edit 7/28/13
You can't do the survey for a free drink anymore. I emailed them saying that I understood why they had to stop, but was sad to see it go, and they sent me a $5 gift card for my feedback. Who does that?! Awesome people, that's who! I'll always go back there!