I was looking for private and small group lessons to supplement regular season practices for my 12 year old son. He was only getting two practices a week and not working on individual fundamentals. This was the perfect find. A friend recommended HoopGrind so I signed my son up for an individual lesson with Rathen. We asked him to focus on shooting mechanics. That's exactly what they did. Coach Rathen was great! My son shot so many shots within an hour period, his arm almost fell off. Coach Rathen worked with him on proper shooting mechanics and my son immediately started making baskets more consistently. We liked it so much, we booked a group session for the same week. The app is super easy to find, book, and pay for sessions that are convenient to your calendar.