I’ve been trying to sort out Ruby 2.0’s refinements from an
implementation and usability perspective, and I figured a blog post
might get more people involved in the discussion.
I’ve posted that here:
I’m really hoping folks will jump into the conversation to help
refinements move forward the right way (or else to help get them
removed) so that Ruby 2.0 isn’t irreparably damaged by a bad feature
or bad implementations of it.
Thanks for your time 
- Charlie