Whats up griffin,
Had a friend who had that, I didnt know much else besides that it was a "shot" as he called it, and released throughout a period of time. Me personally, I am on bupe maintenance, and on a low dose which I find is ideal, and sometimes I skip a dose or two to really feel the following one. I still do have cravings. But I can see two sides to this.
Its a good idea in the view of relapse, as it becomes less ideal as you cannot simply skip a dose, but for someone who isnt serious about recovery wouldn't have access to it based on what your saying about the six month requirement.
I see it as being bad because for someone like me I find I like to lower my dose or skip sometimes perhaps for sex drive, recreational use or clarity of mind sometimes.
Theres two sides, maybe more. But I wouldn't do it personally, I like to be in control of my own habit and recovery if I can manage.