I just could not get it to work. I follow several instruction pages carefully. I was initially trying to follow:

http://ruby.railstutorial.org/ruby-on-rails-tutorial-book#se...

I kept getting issues with versions.

I should have specified that, I do not necessarily think it is a bad product, but it did frustrate me a lot when trying to set it up. I'm sure it has saved a lot of developers time, but I speak for myself and myself alone, and the cost-benefit for me was way off.