I've never used one, but I would suspect the biggest value is just having someone confidential and with no conflict of interest that you can just talk to and pu

I've never used one, but I would suspect the biggest value is just having someone confidential and with no conflict of interest that you can just talk to and put your thoughts in order. See also: http://en.wikipedia.org/wiki/Rubber_duck_debugging http://en.wikipedia.org/wiki/Rubber_duck_debugging