I have spent about 15 minutes with it so far and my initial reaction is that I wish I had something like this sooner. I started with building a PRD document. It would have saved me a TON of time. The way the questions are phrased are intuitive and prompts the product manager to ask the right questions. I presented a high level use case for a product for teachers with a high level user story. What was provided to me was a really great start in building a new PRD.