We've done a number of distillery tours and this is definitely a really good one to try.
The staff were all very friendly and helpful, and our guide (Zoe, I think?) was excellent. Beforehand we had a look round the interactive museum, which was interesting, then we were on the 'basic' tour which is excellent value for money.
The tour itself takes an hour and was really informative, especially about the blending process and the history of Dewars. At the end you get 1 dram from a choice of 3, or a drivers pack if you're not partaking. There's also a brief film you can watch before or after.
The shop was very good too, and the cafe looked nice (although we didn't use it).
Whether you know a bit about whiskey already or if you're new to it, we'd definitely recommend.