Sure do.
Did tours and/or tasting at MacCallan, Glenfiddich, and Jameson (Irish whisky can be quite nice too ya know...) and proprietors/guides at all three recommended it.
Jameson was actually the first of the three I visited (my wife and I did a self-driving tour of Ireland and Scotland for our honeymoon eight year ago) and I could not believe the difference that little splash of spring water made.
Whether I add it in the form of water or ice (I know, a faux pas/sin in hardcore Scotch circles), well, depends on my mood.