I've had the opportunity to supervise instructors that trained at All ATP's getting their CFI/CFII/MEI ratings. What I saw was fairly universal - ATP did not teach these students the basic fundamentals of using that rating. More over, they taught the student how to "pass a checkride". I'm not coming down on any pilot that was a part of that program - just the program itself. If you get the rating, great. I would hope that most places would like to see more than just a piece of paper. You should probably be able to back up that piece of paper with some actual skill other than flying a Sim. We have all "paid for training" when we got our Private, Commercial, etc. But paying for time in an RJ Sim that any company would give an appropriately rated, well prepared pilot for free is just stupid.