Every review says as much about the person reviewing as it does the business reviewed. Olga is a conscientious and professional piano and voice teacher and I highly recommend her. A bad review is telegraphing that the person writing it has specific things that set them off. Sometimes these are fair and then the review reads as sensible.
Typing a bad review in ALL CAPS is not sensible. The person comes across as obnoxious and at best, as fussy when focused on things most people consider unfair, like free lessons. Unless it is someone who shares the same issue, when someone like that writes a bad review the only person he or she is pushing away is someone LIKE THEM. So in that respect, they're doing the place a favor because they are aborting another bad review.
Most of us read multiple reviews and can sort the rational voices from the angry ones. I am a parent of two boys and I have to say that $20 for quality one-on-one (private) 30 minute music lessons is too cheap. This is especially true if the teacher has several university degrees. Yes Olga gives us a discounted rate for my younger son but I do not expect her to teach for free. I am yet to see a teacher giving a $20 private lesson and free lesson for the 2nd child. To do it once perhaps, but that deal would be too good to be true to sustain long term. Not only would the teacher soon go out of business but it is unfair to the parents who are paying a higher but fair rate. In this day and age that is not a fair price for a qualified music teacher. However, $20 for a group lesson of 4 or 5 kids would make sense.
My boys were able to read notes from their first piano lesson and are able to interpret a piece of music. Their lessons include scales, arpeggios, classic pieces, aural testing, sight reading and music theory. She is currently preparing my eldest son for the grade 1 Associated Board of the Royal Schools of Music (ABRSM) Exam. I can say she has gone above and beyond what previous piano teachers have delivered, even extending the lesson time by 5 or 10 minutes if needed. She was more focused on my boys understanding the concept than anything else. In fact and she spaced our lessons so they do not overlap giving me ample time to discuss any concerns. Our experience has been that we get more than what we pay for at each lesson. No one should have to work for free. The effort Olga makes in teaching our boys correct finger posture, rhythm and theory is incredible. She is great with kids and I could not ask for a better teacher.