Is using underscore suffix for members beneficial?

Question

class C {
 private:
  int member_; // here is the underscore I refer to.
}

This underscore is recommended by Google Style Guide and Geosoft\'s C++

Answer 1

To me the benefit of this style of decorating member variables is it works well with auto complete functionality of text editors. Having a prefix decoration requires you to type more characters before a solid guess on what you mean can be made.