What can you possibly say? Monty Python IS British comedy. No one else ever has or will come close. They didn't raise the bar, they created a whole new species of Python fans!
Cons: If you can find a proper con, you deserve to be exploded in one of the sketches.
Grandmum always made this for me when I was little, except with homemade blackberry brandy and honey. The honey soothes your throat, the alcohol makes you sleep. Whisky's good too.
Cons: Normal warnings and restrictions that go with drinking liquor