I just used them for a small project and was really happy with it. They provide just a couple environment vars attached to the process object and you're good to go.
I was talking to some of their employees at nodeconf this year and they explained that since Heroku only routes one request to an instance at a time, it essentially blocks on each request and you never get to actually leverage the concurrency of node.
I was talking to some of their employees at nodeconf this year and they explained that since Heroku only routes one request to an instance at a time, it essentially blocks on each request and you never get to actually leverage the concurrency of node.