I took the VSP from the Marine Corps this past fall. I did a mountain of research before I pulled the trigger. If you do greater than 179 days voluntary (ADT/ ADOS) (not sure on exact acronyms) you trigger a payback. Technically you need to take a day off and then can go back on for 179. If you are involuntarily mobilized the time limit goes away. If you look up the 2014 OFFICER VSP MARADMIN in google it lays out some of this. I got the rest from some SMCR guys I know flying Hercs. I go terminal in May and am a rushing fool working the reserve flying piece. I'll start a new thread this summer to lay out anything I pick up in the process. Now I get to wait on a reserve board and the long wait in the application process with the majors. But at least my next moves are on my terms.