I have had Vita as a coach for several months now and it would be hard to understate the improvement I’ve seen. In just a few months I’ve seen an over 150 elo gain in my USCF rating.
She is very flexible with her schedule, patient as a teacher, and good at identifying weaknesses in my play.
I was so impressed with Vita that I even got my 7 year old son and my daughter started doing lessons with her and they have been seeing improvement as well. She is very good with them, not stern or forceful but understanding and helpful.
I have had other teachers before, one in particular who is very successful and has produced many good books and videos, and I can say without a doubt that Vita is the best teacher I have had.