I have used it for multiple projects and it gives a huge head start compared to starting from zero. Signing up, logging in, resetting the password, uploading, etc all seem like easy work but when you pile them all up you can easily spend a week just getting to the point where you are within minutes of cloning the starter repository.
However the failure of GoChat is not relevant to Pokemon Go. While GoChat might have done something very wrong comparing 1mil users to an app with tens of millions of concurrent users is invalid. Pokemon Go would be a NoGo running on a single Node.js machine without any sort of balancing.