Ranked in these QuestionsQuestion Ranking
Pro Manages application versions
Pro Highly customizable environment
Pro Very cheap
Depending on your load, AWS Elastic Beanstalk is most likely the cheapest option for Node hosting. This is due to you only paying for the underlying AWS services.
Pro Multi environment support
They support environments and promoting releases from one environment to the other (e.g. qa -> production).
Con Poor documentation
As it is a very new service, there is currently poor documentation for node on AWS.