In my new hire class, roughly 15 out of 20 of us were hired because we had taken a "Jet Transition" course. In fact, if you had a total time under 700 hours (which about half did), it seems likely you wouldn't have received an interview without it. Obviously the folks in the hiring/training department felt it was an important ingredient to being successful in training. So in that sense, if it got you the interview that much sooner (timing is everything), then maybe it was worth it.