Agreed, at first I was skeptical because the marketing message on the site seemed a bit over-hyped, but it turns out it is a really valuable tool for streamlini

Agreed, at first I was skeptical because the marketing message on the site seemed a bit over-hyped, but it turns out it is a really valuable tool for streamlining both testing (invoke local) and deployment when working with Lambda. New users also benefit for the basic scaffolding (severless create) and the documentation is pretty decent. I have tried kappa (Python) and node-lambda (Node.js), and serverless works better than both of them, is more frequently updated (Lambda and API Gateway themselves change frequently), supports more languages (I have used it with Java, Python and Node.js) and has a much larger, more active community. The API gateway support is pretty simple and solid, and they also allow you to use cloud formation rules directly so it is very flexible.