This is by far the quickest drive thru I have ever been through. I frequent Mc'D's often and even when there is a line of 10 cars in front of me, I'm in and out of the drive through very quickly. Unfortunately their drive thru pattern is a bit confusing and for those that do not pay attention to the lanes, it can cause a back up in trying to leave the parking lot.
Pros: Drive-Thru time
Cons: Drive-Thru traffic manevering