We did the classic tour here which run on the hour and is free to do. Our guide was faultless...smiley, friendly, enthusiastic, informative and bi-lingual which was most impressive. the tour lasted an hour and gave us a basic overview of the huge distillery (did you know that the trees surrounding the site have turned black because of the alcohol in the air?!). Tasted 3 whisky's at the end which I didn't expect on a free tour.
The grounds are imaculate and impressive in themselves.
The cafe was spotless and in a stunning converted building. Reasonably priced and high quality food and drinks and the service was quick but not rushed.
Faultless was to spend a couple of hours even if you don't like whisky!