Ema has an immense knowledge of yoga. She makes an effort to get to know all of her students and tailors the poses to the students in her class. She explains what the benefits are for all of the poses. The classes are great for young and old, new as well as experienced. Whenever I had a question,she is always happy to answer it.
Ema Stefanova runs yoga retreats in western Michigan at an old monastery. She does not disclose everything about the retreat (e.g. that you may be the ONLY one participating, that there may be manual labor involved) and is a bit unprofessional and socially awkward. I suggest you do not participate in the retreat. She does get a star for being a good yoga instructor, but the retreat is terrible.