I am an athletic adult who had never played tennis. Arnim set reasonable goals and had me rallying consistently within 4-5 lessons. I was surprised to be ready to play mixed doubles within 2 months. While Arnim is friendly, he was able to firmly challenge me to reach goals. Unlike other instructors who focus solely on strokes, Arnim's approach is comprehensive - including athleticism, bio mechanical, and learning styles. I highly recommend him!