"Ivan was a great help for me during the series of lessons I took with him. I had been learning on a chromatic bandoneon so Ivan was the first teacher I had studied with who could help me with fingerings: all of my other teachers used the Argentine system. Even though the classes were online Ivan was always very helpful with the nuances of my playing, always offering very musical suggestions. Ivan's understanding of tango performance techniques is very good. I can recommend Ivan as an excellent bandoneón teacher without hesitation."