I don't recall seeing very many 15 - 20 year old Canadian whiskies so I was intrigued when I saw the 20 and 15 year old expressions of Mt Logan in the Liquor Depot in Alberta on a recent business trip.  The Mt. Logan brand is exclusive to the Liquor Depot retailer and the juice is made at the Highwood Distillery in Alberta and bottled as Canadian Rye whisky at 40% ABV.  The nose is sweet with vanilla, Werthers Candy and lemon peel.  The taste is very smooth and creamy with coffee, cocoa powder, butterscotch, vanilla toffee and Scottish tablet.  The finish shows some sign of 20 years in a cask with pepper and oak notes and black tea.  A little water thins out the creamy mouthfeel and the sweetness goes down (which some might find more balanced) but overall I would avoid water with this as it doesn't handle it very well, for my palate anyway, and would be easy to over dilute.  Of the two expressions of Mt. Logan Canadian Rye that I tried (15 year old and 20 year old) I preferred the 20 years old (neat) but both were good.