A jet transition course is valuble, no matter what anyone else says. When I was in training, all of those who failed had no expierence in a jet or a transition course. Its not that you won't have to study all the companies profiles, procedures.. bla bla bla, you will. But the first 2-4 sims when everyone else is learning what all the knobs and switches do instead of working through the lessons, you will already be working on more of the procedures so the first time you see a V1 cut isn't at sim 5-6. Is it worth 8Gs? Thats debateable, but it will definately help you in training. I saw a guy in my class with 3000 plus hours, much of it single pilot IFR in a caravan, guess what, he was lost in the CRJ, with a transition course the learning curve wouldn't have been too steep for him. CFIing and gaining hours in a senica will not help you in a CRJ (or equivalent) on the same level as one of those courses, period. FInd a cheaper one, or maybe buy a couple lessons familiarizing yourself in an FTD of the type of aircraft you intend to fly at your next job.