I have been a power user of PowerApps for 3 years. I would call myself the ideal user of such Low Code / No Code platforms - I am a business leader and build such Apps for my own business management use cases. PowerApps was powerful but required a lot of coding, and integration with other systems was clunky. In contrast, AppSheet is super simple and therefore easier and quicker to implement once you understand it's architecture and integration is easy too. And best of all, AppSheet performance is so much faster so the user experience is overall much better!
It's affordable, integrates seamlessly with Google Workspace, allows transfer of ownership to other accounts, has a wide array of built-in features and enables connection to Apps Script for expanded functionality.
The expression library is fairly comprehensive in scope and similar to Google Sheets formulas and SQL functions, making it easy to learn.
The platform is still receiving ongoing support and improvements so it's a promising platform to build within!
Simplicity and organization make the platform intuitive for creation, allowing the developer to focus more on the creative process (objective and functionality of the solution), leaving less work for the programming logic part of the solution.