From personal experience, I have trainined over 30 ATP checkrides while working at ATP, every examiner that we use has basically the same oral. Every examiner has their own aviation questions that we can't teach you. Basically they have to do with your experience as a pilot and "what would you do if " type questions. The rest of the oral is based on aircraft systems. All of the 4 examiners we use at my location, 3 of them do 3 approaches, one guy does 4. They all do a variety of ILS,LOC, and GPS, no VOR. One of the non-presion is a SE Circle to Land, SE ILS to a land, and a missed approach of some type. The ride length varies between examiners, usually lasting 1.2-1.5 hours. It is a fairly easy ride, all stalls are recovered at the first sign of a stall, the horn, steep turns are no different than PVT multi standards, 45 degree AOB +/- 100', one examiner does slow flight +50/-0, others skip it. The stalls vary based on the examiner. But many people have come to ATP to do the 2 day ATP program having never flown a seminole or even a piston driven aircraft for that matter. The checkride is alot about being a safe pilot with a captain's mental attitude and thought process. I have had 3 checkride busts in 9 months, 1 guy couldn't remember how to do a proper mag check(never flew a piston), and the 2 others got lost in the Garmin 430. That is the hardest part for most people coming to us for the 2 day program. Anyway, the checkride is really straight forward, and pretty simple in my opinion.