Harriermech, will you be going to BOOST as part of MECEP?
Anyway, I think MGIB works the same regardless of when you start it. I would recommend checking out the grants and scholarships first, especially if you think you might like a master's in the future. However, the MGIB is a good deal because YOU get the money, it is not paid directly to the school. Therefore, anything above grants, scholarships and MGIB goes in your pocket. If you are unsure as to whether or not you wish to use MGIB for a masters, I recommend using it while part of MECEP.