Welcome!! Did you get your car yet?? I used the non-factory method. Then I took mine to the track after 300 miles. Constantly on and off the gas all the way there on the freeway (I must've pissed off a few people lol). Stayed below say 5000RPM when there. She runs great now, no problems. Had the oil changed at 1000 miles.
I've heard others using the factory method and their car turned out fine too. So I think as long as you don't load the engine for long periods at the same RPM or low RPMs you'll be fine. Also, try not to do much of any engine braking the first 800 or so miles. Let us know if you don't know what this is.
Oh and:
