Ranked in these QuestionsQuestion Ranking
Pro No dependencies
Which in other words means, a high performance solid core which provides you with a with a minimal (but stable) layer to build your app on.
Pro Websocket support
Up to date with Websocket RFC 6455.
Pro Automated compression
Minification and gzip compression is built in and automatic.
Pro Good documentation and examples
Often updated examples and well written documentation.
Pro Getting the things done efficiently without useless ceremony
Following and adding to Node.js the proven battle-tested paradigm implemented by Django, Laravel & ASP.NET MVC.