It's a very dark beer with a thick, frothy tan head. When held up to the light, you can barely see a ruby glow through it. It smells sweet and sort of toasty, with strong coffee notes that are emphasized when you take that first sip. It's got a roasted coffee bitterness that coats the palate in a very pleasant way. There is a sweet, chocolatey malt flavor and a very smooth mouth feel. However, I'd have to say it didn't feel quite as creamy as I'd expected. Perhaps I've been spoiled by Boddington's, Old Speckled Hen, and other English cream ales, but I really want a thick, luxurious texture to a cream ale.
The sweetness of Mac's Blackwatch lingers on the palate for a while, and though this beer has a disappointing lack of hop characteristics, it is still a very pleasant, enjoyable porter that I'd recommend for anybody during these chilly Autumn evenings.