An open source web framework which follows the model-view-controller architecture. It is light-weight, web-friendly, and stateless. It provides minimal overhead for highly-scalable applications.
Ranked in these QuestionsQuestion Ranking
Pro Rapid application development
All error checking and testing done in the browser only needs a page refresh to show the latest updates. This is huge, allowing the ability to code in real-time and make quick edits. Without it the develop would need to reboot/recompile the entire application to test with new data.
Pro Asynchronous requests
Everything with Play has been built with asynchronous requests in mind. This will result in the application not blocking results while waiting on other operations. With this implemented your application can be developed with multiple threads in mind without worrying about hanging on one request before it completes another.
Pro Great resources
With some basic starting tutorials and a fleshed out documentation, there will be no need to go asking others for help, there should be enough for a developer to find a solution.
Con Not backword-compatible
Applications that have been written in Play 1 will not be supported in Play 2 as the core of the framework was rewritten in Scala. This includes plugins that were working in Play 1 as well.
Con Becoming a Scala framework
As Play continues to develop and mature it seems as if it is becoming less of a Java framework as the core has been rebuilt in Scala. This may deter adopters.