I'm part of two open-source frameworks -- http://deeplearning4j.org http://deeplearning4j.org and http://nd4j.org http://nd4j.org -- and I can tell you that we

I'm part of two open-source frameworks -- http://deeplearning4j.org http://deeplearning4j.org and http://nd4j.org http://nd4j.org -- and I can tell you that we spend about half our time listening to users, fixing bugs they report, adding features they request and improving the docs. It really helps when other users kick in to help.