Glenlivet says to cut Nadurra with spring water.
No, I haven't. I usually reserve that for some strong bourbon like Bookers.
The common ground here is the alcohol content.
Bourbons are usually sold at cask strength (depending on the year it usually ranges from 45% to 60%) Bookers specifically range at very high alcohol contents.
In contrast, generally scotch is already cut (watered down) to precisely 40% alcohol. Nadura is an anomaly and is uncut remaining like many a bourbon at it's original cask strength, in this case a potent 57% or so!
It will have a MUCH stronger bite than the average sipping scotch, hence if you want it to drink like a more traditional scotch ya gotta water it down!