I was always a little wary of this whisky.  For a start the name seems to be implying a "single cask" bottling which it isn't.  There are in fact three different Singleton expressions (that I know of), the others include the Singleton of Glendullan and Singleton of Glen Ord,  and I find the marketing and this concept a little confusing (it was not clear to me until recently that each was from a different distillery) and so I have to believe other consumers do as well.  I found the nose on this one fresh and malty, perhaps with a hint of new make, and then some dried fruits and sherry, like a christmas fruit cake.  The taste is quite rich, spicy, warming, and well balanced and nothing really stood (good or bad).  There was some oak and possibly even a hint of smoke in the finish.  I added a little water to try and bring out some other notes but all that did was kill the whisky and I got nothing new after that.  While I am usually happy to add a little water to single malts, this comes at 40% ABV and didn't seem to stand up very well when water was added.