I've always enjoyed a good draft Guinness. The stuff in the bottles is fine for cooking with, but not a great drink.   While there are other stouts that I enjoy more, I think that a properly served Guinness is nice.   

Recently I was in Washington and stopped into the Dubliner, reportedly one of the finest Irish pubs in our country.   Their pint was served very, very cold and was awful.   On the other hand, there is a bar in my hometown that serves "the perfect pint".

I think that there are beer snobs that will automatically disregard Guiness.   Because it is successful, people automatically feel that it is inferior.   As McGrath pointed out, the upkeep of the establishment will determine the taste.

Again, if any of you find yourself in Northern NJ please look me up. I would love to sample some great brews at the beer mecca - Andys Corner Bar in Bogota, NJ.   Finest kind.