I was able to make my appt. in Detroit within a week of my conditional approval, but keep in mind that the Nexus interview site is at the foot of the Ambassador bridge near downtown, not at DTW. Also keep in mind that the Detroit Nexus site does not do iris scans, so once you get your Nexus card you'll have to go somewhere else, like YYZ, for the iris scan, although an iris scan for a Nexus card holder does not require an appt. (you can just do it on a walk-in basis - we drove from Detroit to Toronto to visit friends and stopped at YYZ and the whole process, including parking the car in short term parking, only took 30 min.).