Some of them work, some of them are just horrible. I remember one of the better ones was for Sega Genesis back in the day, where they just blatantly said they were better than Nintendo, and even name dropped them. Genesis does...what Nintendon't. It didn't get me to buy one, but I give them kudos for having balls like that. Also, while it was an obvious attempt to be hip, PS1's URNOTE campaign was interesting.