I've been using it quite a bit and I like it a lot! You certainly could roll your own prompt for this. The value I'm seeing is in the reusable skill/prompt to structure tutorials in a way that help me think and learn a new concept (rather than Claude just giving me code to copy/paste), and the local UI that makes working through the tutorial much more pleasant than scrolling through Claude's markdown output. Plus tutorial series are persistent so I can easily come back around later with a `/lathe-extend` to explore an extension to a topic/tutorial I'm interested in.

That said, it's been a tool that's been helpful for me personally, but doesn't have to be for everyone! I've never used ChatGPT Study, I'll look into it more. Thanks for sharing!