Jazz Piano Method: I've personally studied with some of the best jazz pianists in the world over the years. Out of all of them, I recognize only one as having that "plus" element that Peter Martin certainly has. Your "typical" jazz piano master has a complete control over the repertoire, an incredible ability to transpose, and a total mastery of the language. They will largely base their style on the imitation of Bud, or Barry, or Cedar, mostly playing in one style (for example with shells in the left hand) Peter is different..an amazing left hand and dozens of ways to approach piano solo in a tangible way that works and swings. The simplest example: for many pianists, playing half notes in the bass register would be deemed as "mechanical and non idiomatic". Peter proves stuff like that is not only possible, but incredibly functional and hip. He's a great teacher, he explains as best as he can how to get from point A to point B. With that being said.... The main problem is that the average student (if he has not gone through a serious education and/or through a series of real life traumatizing experiences) will not likely be able to properly assess his level. Not only will be the choice of what to study a problem, but also how to. Peter will show a concept on how to improvise and play an amazing tranche of a solo based on that, but the student will likely understand the concept and not sound that good, because he doesn't hear stuff like Peter does. The real benefit comes in copying Peter and then making your variations, your considerations, why not...your etudes. You can't expect to receive a formula "improvise with triads" and sound good, if you don't know how to really absorb the way of playing like that functionally. That takes time. And a single lesson can be material for months, if properly studied. Openstudio can then become a serious expense that won't really benefit the overwhelmed musician. They are email friendly and there is a possibility to be guided, although I strongly believe that only Peter would have the actual competence to really guide somebody. Personally, it took me years to learn how to guide myself through stuff like that. The comments section of the lessons is almost always empty and when somebody asks interesting follow up questions, they are not replied. The Facebook group is a desert. The best thing for a student would be to check his solo piano elements lessons, learning how to play tunes, then absorb some concepts on how to play on the various tunes Peter describes, all that with the guide of a teacher, if he/she is not ready yet. The best suggestion I can give is to offer a paying service that first filters the student's level (ex: send a tune played in time from start to finish) and then allows him/her to ask specific little questions to Peter and then receive a personal short video, even weeks later.