Do you use AdBlocker?

Curious as to how many of you use this kind of thing. The Chrome adblocker is excellent. I don't recall it ever blocking a legit pop-up, and only remember twice when it failed to block an ad. For those situations, just right click it to get rid of it forever. Very nice. Also stops Youtube ads! I used to be one of the people that knew about it but didn't bother to install, but now it has become a great tool of mine.