I'm sorry to say that I regret my purchases! I had high hopes, OpenStudio really does have a stellar cast of amazing musicians! I purchased 2 jazz piano courses, I printed my first 100 page course to discover that it is difficult to read, painfully compressed. It's the font size and bunched notes that make it more of a visual challenge rather than a learning experience. Then, I started my second course to discover that the video player has just one setting - video quality... you cannot project/cast to another device, there is no ability to move forward or backwards, just pause, or restart from the beginning with no fast forward!!! Can you imagine? It is exactly like those infomercial ad players that do not allow any control. So, if I want to back up 15 seconds - just reload the page and start over??? Sadly all of the contributors have attached themselves to an anchor, I just wish there was a boat attached.