I avoid any library that is too magical. If a project asks you to just run this magical tool that will organize your source tree just so, and then it asks you t

I avoid any library that is too magical. If a project asks you to just run this magical tool that will organize your source tree just so, and then it asks you to put your source code for each thing in a certain place, and don't worry about anything, it'll just work (cough cough RoR cough cough), then I'm not interested. Because sooner or later, it won't just work. And then I'll have to figure out what went wrong, which you won't have told us how to do.