You either like the Innis and Gunn style or you don't. All of their beers are barrel aged, but the wood style varies. They usually share common flavour profiles.

Highland Cask Innis and Gunn = 7/10

Ratebeer 2.78 32nd percentile
Beer Advocate B-

The nose is classic I&G: sweet with vanilla, honey, butterscotch and fruits. This one had a mystery sweetness. I assume it was heather because the box said so; I will make a mental note to smell heather next time I see some. The flavour followed the nose and delivered sweet vanilla, wood, light peat, fireweed honey and a vague fruitiness. A creamy ending only left more vanilla and butterscotch. The I&G style is either on your love or loath list.

Taste +3
Aftertaste +1
Alcohol Content +1 7.1%
Value +1
Appearance +1 (Always have classic boxed packaging)

I&G Canadian Cask 2009
I&G Rum Cask and a health kick