@juniper, I’ve been practicing for about 15 months. I work with one of his teachers, and I started with her first. I was instantly hooked. Each time I tried a new teacher, I compared them to her. I found four that I really liked, and they were all trained by Rusty. They all help to find your “edge” by encouraging you to do as much as you can, but tempered with compassion, so you don’t go too far.
Incidentally, though he teaches Bhakti Flow, the teachers in my area that I mentioned do Vinyasa Flow – some in heated rooms (98 degrees), others at about 78 degrees. It’s the same movements, but Bhakti stresses more spirituality in the practice.