I've used Anvil in production government & medical billing projects with strict compliance/IT reqs
What do you like best about the product?
Productivity gains with the visual layout and database builders, web based IDE and project management, integrated ORM, Email, PDF printing, 3rd party integrations (Google and MS services, Stripe, etc.), extensibility using the full Python and web UI ecosystems, rock solid performance and reliability of the open source anvil-app-server in many challenging IT environments.
What do you dislike about the product?
The open source server is a relatively large install (>300Mb), so not the best fit for quick little scripting tasks (although the paid hosted version is fantastic for quick little scripts that run on anvil.works servers).
What problems is the product solving and how is that benefiting you?
Massive productivity gains in agile software development. The full suite of UI, database, and all-Python front-end/back-end interactions, with a web-based IDE, integrated GIT, autocomplete, etc. makes development work fast. Deployment in a wide variety of IT environments, with deep security and other organizational review and compliance requirements, has been 100% successful in every case.