Recommendations to others considering Google App Engine:
limited language support: Java, PHP, Python, and Go. - no true RDBMS support without paying a fortune for their scalable MySQL database - Python is locked to v2.7 ... and Python libraries have to be 100% Python, they won't let you use anything that integrates with any C-based libraries (which can limit things like which framework you want to use) Review collected by and hosted on G2.com.
What problems is Google App Engine solving and how is that benefiting you?
GAE has a great UI that includes a record viewer and a data editor. With Azure, you have to catch external viewers/editors for this. Also, GAE lets you have several sorts of your application running on the same data store. You can deploy, test a variety and then set the current ‘live’ version when you are prepared. You can change back anytime if something goes wrong. Review collected by and hosted on G2.com.