Retrofit without ChaRM in 7.1

Fellow Members,

I was going through the blog by Hannes Kerber on retrofitting in 7.1 (http://scn.sap.com/people/hannes.kerber/blog/2013/06/13/do-i-need-charm-to-use-retrofit) This seems to be an interesting feature. Does anyone here tried Retrofit without ChaRM in solman 7.1 ? If yes, would you pls share some insight into how it works and use case etc?

Looking forward for some helpful inputs.

Regards,

Vivek