You were asking me what would I like to see in Rubymine documentation? I have responded to it in the previous thread. For me though, following feature functionality is what I was looking for in NetBeans for the longest time and they still don't have it:
You can evaluate any expression while debugging session is paused or a breakpoint is hit.
Just press Alt+F8 and type an expression or a code fragment. RubyMine editor coding assistance is of course available here.
Remember that all expressions are evaluated against the current context.
This is out of your documentation and I have tested it, it works fine. I would love to see this and the Rails Console tied together somehow and make it a totally interactive development environment. That would be very hard to beat. What do you think?