Whether or not the advert is good or bad look at the interest it has generated in the "brand"
Look at the recent Cadbury advert with the Gorilla for another example.
not really, simply put everyones talking about the ad, no one cares its for guiness really, it was just supposed to be a good ad. anyone thats ever had a pint of guiness, that was it, like marmite or a small selection of things it tends to be a hate/love relationship. the other problem is we all tend to like to drink quite a lot, everyone that even likes guiness just don't like how difficult it is to drink in quantity.
seriously, spend this money mixing a few hops and yeasts till they get something nice, or, more simply, copy a popular drink, change the name and add in a new flavour and you've got a far bigger profit spinner for way less money.
i mean at uni, drinking games, weird rounds, pub crawls, a guiness round is stupidly rare as so few people like it, where a absinthe, navy rum, whiskey, lager, cider is all so more widely drunk.
no one gonna buy a guiness based on this add, they were either going to buy one anyway, or they liked the advert and go buy a pint of lager.