Pros: Hops galore, and astonishly well-hidden ABV.
Cons: Could use perhaps more of a dash of fruit/sweetness.
Sierra Nevada is legendary among craft beer enthusiasts, and their famous pale ale - now widely available and readily found in podunk Walmarts all over the nation - is still arguably the greatest example of the style (I've had many pale ales in the last two years, but Sierra's still seems to be the most well-rounded). Nonetheless, Sierra Nevada has not been content to rest on the greatness of their pale ale alone - the company has branched out and made top-of-the-line ales in other styles as well, including their Torpedo IPA, and their ridiculously powerful Hoptimum Imperial IPA.
Bigfoot is Sierra Nevada's barleywine. Having never had a barleywine before, I can't compare it directly to other beers of this style, but one thing that struck me as I drank this beer was how much it tasted like Boulevard's Double Wide IPA. The reason for this is that both beers use the same hop mix - cascade, centennial, and chinook.
Most descriptions of barleywines emphasize both the bitter and the fruit/sweet characteristics of the style. In the case of Sierra Nevada Bigfoot Ale, the swing is definitely in favor of the bitter hops rather than the fruit/sweet side (of the three hops, cascade is the least evident - you won't notice much similarity to Founders Centennial IPA, for example, which uses the grassy and wood-like, floral cascade hops exclusively as a single-hopped beer). This isn't to say that the latter is neglected, but it's only noticeable in the middle part of the sip, fading quickly as more bitter hops take over and exert their powerful influence.
Perhaps the most impressive part of Sierra Nevada Bigfoot Ale is how well the 9.6% ABV is hidden. Typically beers that have such a high alcohol volume leave a sharp, biting aftertaste so potent that you can even feel a burn in your nose, but I have never had a beer at this ABV range disguise its ABV so well. In fact, this beer, even with all its bitterness, is so easy to drink that it's almost scary how easy it is for the ABV to creep up on the drinker! Be careful with this powerhouse.
In summary, once again, Sierra Nevada comes through with a quality beer, but expect much more bitterness than sweetness, and keep intake reasonable given how well the ABV is disguised. 4.4 stars.