The Comair CFI program is very expensive and doesn't gaurantee a job despite what they tell you. A friend of mine did his CFI there and was then told at the end that they wouldn't employ him because he hadn't done all of his ratings with them!
I have heard that this policy varies from month to month depending on what the requirements are from Comair academy for instructors at the time. Even if you are taken on you get paid next to nothing and work for them for the next year.
I would suggest looking into ALL ATPS - they advertise in Flying magazine. You would get a lot more Multi time with them.
Best of luck.