I've noticed measurable benefits and return on investment by choosing Google App Engine.
Google App Engine offers seamless device integration and a serverless infrastructure, enabling developers to concentrate on code. The auto-scaling supports swift user expansion, while deployment is simplified with an easy setup. Despite its scalability and open-source support, challenges include limited documentation, difficulties in pricing assessment, data consumption issues, photo-sending restrictions, and migration limitations due to proprietary technology. Additionally, restrictions exist in the standard environment regarding file systems and WebSockets.