If you are interested in getting under the hood of a mechanical watch in a meaningful way and getting a solid start on trying your hand at watch repair/servicing this is the course you need. It covers all the bases and requires zero knowledge to start. It’s given me the confidence to go deeper into the hobby, and while mistakes have been made it wasn’t because of Mark’s instruction. It’s great to be able to go back to review the material any time I need for a refresher.