MAPD is one of the very few pay for training programs (PFT) that actually delivers a fairly high success rate at getting an airline job, about 80% for folks who start that program.
However, you need to understand that 250 hour PFT airline pilots are usually viewed with suspicion, contempt, or outright hatred by the rest of the airline industry (depending on what phase of bankruptcy they happen to be in). While you can get a quick job at Mesa (considered an industry bottom-feeder in many ways), lack of CFI experience could harm your career prospects in the future. Research it carefully.