It's a bit clunky navigating around and doing lessons. I've been at it for a few days paging around through various levels, and I still haven't found material that's calling to me to practice. It's either too easy or too hard or not interesting. I don't have a good sense of the structure and goals of each lesson, how the lesson fits into groups of other lessons, etc, would be helpful if this were made more clear so I don't have to skip through them and guess. For example on a guitar site I love, whenever you do a lesson, there are tags associated with that lesson, such as "difficulty level 3 out of 10", "category rock", "string bending", "string skipping", "phrygian dominant". And you can see other lessons that are string bending lessons, difficulty 3 out of 10, and so forth. They also had prebuilt paths to gradually up the difficulty and progress. In summary, I've been browsing and playing around a bit for a few days now, and I still don't have a clear idea of how I'm going to use the site and the content to progress as a pianist and musician.