Well, I don't know how it works for you guys, but adverts more often than not have the opposite effect on me to the one intended - they usually put me off buying stuff.
I object to having this crap forced upon me, whether on TV or in the cinema. At home I watch less and less TV these days (partly due to the fact that a lot of what's on is utter shite, and partly because of the ever-longer, ever more frequent ad breaks, for which I usually use the mute button), and for my relatively infrequent cinema trips I try and turn up just a few minutes before the actual film is due to start so that I don't have to endure the interminable ad breaks.
I detest adverts!!!