Well this would be a very long post which I don't currently have time for, but in short:
_ His attitude is just awful. He is so condescending and rude, always, and even to Misty, who is a principal dancer. He treats her like she has no idea what she's doing, the way he does everyone. For that alone, I couldn't work with him, even if he knew his stuff.
_ On the technical side, he is so wrong about most of the things he says and does. For an easy example, just look at how he has Misty (and his wife and son) do first position. They have their feet so far apart and they are completely sitting in their hyperextension and their heels. Not to mention, there's no way to lift one's leg while between 2 legs, let alone let go of the barre. So his whole "it's all about placement" is true, HOWEVER he has no idea what correct placement is. I can tell you from experience that the teachers at the Bolshoi Academy where he claims to have taught (riiiight) have the students stand with their heels together even if they have crazy hyperextension because that is exactly what teaches one to stack the bones of the standing leg and pull up out of one's hyperextension as is necessary to dance.
He never danced: he was in the tech industry until he decided to study dance as an adult. Since he had the means to do it, he studied in Moscow but that doesn't mean he understood it properly. He hasn't felt ballet in his own body and that is necessary to be a teacher and to pass on the art of classical dance, especially its technique.
His poor wife could be so much further along than she is if she had a proper teacher. She wouldn't need to cry the tears of frustration featured in a recent video. She can't do it because she's not on her leg!!!