I've had similar problems googling for Cocos2d help. OTOH, because you can run the CocosBuilder-generated game in the browser, it is very easy to experiment in the JavaScript console and figure out how the various JavaScript bindings of the C++ classes work.
My own judgment is that it's relatively difficult to get a Cocos2d project to work across all platforms (HTML5, iOS, Android). But once it works, the development iteration loop is very comfortable and fast, because you just refresh the browser to try the current version of the game.
CocosBuilder is now abandoned, I think. The creator is building something similar (cocos2d only, not cocos2d-x) and the cocos2d-x guys are building CocoStudio (Windows only, no javascript, for now). Although I love the idea working with javascript for cross-platform development, the whole project feels immature.
My own judgment is that it's relatively difficult to get a Cocos2d project to work across all platforms (HTML5, iOS, Android). But once it works, the development iteration loop is very comfortable and fast, because you just refresh the browser to try the current version of the game.