I've taken classes from Rod, and would recommend them to anyone who is considering taking a class.
As far as the bridge program is concerned, however, I believe that it would be an exercise in futility for me unless I had regular access to a coach. The reason is that errors creep into my form that I don't notice, and I would imagine that I would continue to incorporate those errors into my form as I shot into the blank bale unless someone pointed them out to me. So after a while, I would just be practicing my errors.
When I'm shooting into a target, I can see the error as soon as it happens, and I've been shooting long enough now that I can usually identify what I did to cause it and correct it. If it persists, I find that I can benefit from a session on a blank bale because I can focus on solving that particular problem without worrying about anything else.
If blank bale practice and the bridge program works for some people, and I'm sure it does, then that's what they ought to do. I just haven't figured out in my own mind how to be sure that I don't just end up practicing my own errors.
Ideally, I would have access to a coach who would give me a tune-up from time to time. Since I don't, I need instant feedback when I make an error, which I don't feel that I can get when I'm shooting into a blank bale, unless I do something really obvious like pluck the string or drop my bow on the followthrough.
If anyone has any ideas on how to get better feedback from the blank bale than I'm getting, I would like to hear how to do it.