It's easy to find videos online to learn Jazz, but it's very hard to find a cohesive and comprehensive course to guide your learning. Open studio courses are exactly that. Peter Martin and Adam Maness have put together series of great videos and guided practice sessions to help you improve your understanding of this music and your playing. After over a year of practice using their courses (namely: "Jazz Piano Jumpstart", "Jazz Piano for Beginners" and "Elements of Piano Jazz"), I feel much more at ease on the keyboard, my ears have developed *a lot*, and I'm able to play the Blues in different keys, solo or with a rhythm section. As for the customer support, it's top notch: whenever I was having an issue (be it a technical issue or a question about music theory), I got an answer in a few hours. Highly recommended!