In all fairness, MAPD has a good training program, and is one of the very few such programs that has a relatively high success rate placing their graduates...
HOWEVER, there a few issuess...
1) If you spend the time and money and don't get hired, you're hosed because no one else will hire you with 250 hours, because of your serious lack of experience. If you blow the interview or Mesa stops hiring, then what?
2) There are many professional pilots in the airline and corporate world who consider pilots who do not have military or CFI experience to be substandard. Being a MAPD graduate without CFI experience could be a black mark on your record when you apply to a major airline. Unfortunately, some young people do MAPD, get an airline job before they have any experience in aviation or life in general, and then act like complete jacka$$es...giving the whole lot a bad rap, including YOU.
3) If you invest two years in full-time training and CFI work you could be pretty close to the 1000 hours needed to get hired off the street at Mesa. You'd still need 100 ME. Also at that point, you would be eligible to apply to numerous airlines, not just Mesa...