Back in the 1980's Alan Bond discovered that beer companies are worth buying cause that's where the money is, which is probably why they appear to produce some of the wittiest commercials, like this one...
http://www.youtube.com/watch?v=OSGuP6Fzg8s
this one is good too...
http://www.youtube.com/watch?v=LCcDH2Nx1QE
but if you want to know what effect their product can have, over here is an honest appraisal....
http://www.youtube.com/watch?v=-jTzWPF9MZo