Questbook is a product with many functionalities and aspirations. Points covered here are from the Landing page and the Product. Learning resources, Adding funds is not in scope for this although there could be some high level takeways for the entire product line
The doc covers most of the high level points, also refer Figma comments for a detailed screenwise nit-picking
Questbook solves for a novel problem with a simple conversational approach to their flows. It attempts to enable onboarding users who are not well versed with web3. However there are few areas I think Questbook can improve.