When you want DQ, you want DQ, so something must really be bad to sway you from going. That said, I definitely bring some notes to study when I go because you can guarantee a wait in the drive through. I've been there 4 or 5 times now and every time it is the same situation - one time the machine broke, tonight it looked like someone was training, or just a lot of cars (can't fault them for that now!). I will say this though, the last couple times I was there the girl at least apologized for the wait, so that makes it all good in my book. At least some of the newer generation has some awareness and good courtesy.