Anybody have Brachy with Boost?

I am meeting today with a dr who owns a brachy clinic. My urologist says my case is too aggressive for brachy, I would need to do the Boost, which he says intensifies side effects. I am doing the meeting to collect information. I am 64, a 4+3, PSA 3.5. Anybody done this? I understand it hasn't been around long enough to study.

Thanks,

Nick