I've taken yoga with Bonnie, and I unfortunately must say that her classes were not my cup of tea. Without a doubt, she is an amazing person. Not only does she homeschool her seven kids, but they were all homebirthed, with the older kids "catching" the younger kids. They also all play instruments and sing and perform as a group! I've met several of her kids and they are indeed very special.
So here is what I did not like about her classes. First of all, it seems like she does not put any limit on the size of her class. I frequently found the classes to be too crowded (actually, the rooms were too small), and I was always conscious of accidentally hitting the person next to me. That kind of defeats the purpose of taking a yoga class if you can't fully focus on the yoga. Second, she does not walk around the room at all and look to see if your posture is right or wrong. I generally like when yoga teachers walk around and straighten your leg or back or whatever is needed. You are basically on your own. And third, she doesn't really talk during the class and explain what she is doing and why.
I've taken classes with a lot of different yoga teachers (although it has been years since I've done it regularly and I am WAY out of shape now - I would like to find a prenatal class to take now while I am pregant), and I think that it is just a matter of trial and error. I didn't like Bonnie's class -- but others love her classes. It is just personal preference.
Good luck -- and report back if you find a good class!