I've taken a few lessons from Oscar many many years ago after I won a few local tourneys. At the time I was overwhelmed and didn't get much out of it. However a few years later things started to click and some things he had said came in handy. To this day I sort of use a version of the aiming system he taught me. A few key things he said stuck with me and I still use those tips today. So I'd say if you're a strong player already and can get a lesson from him it's worth it. If you still have stoke problems then don't bother work on your game first. He's great if you're at least 500-600+ Fargo. That aside he's a great and humble guy.