It's the best ad-blocker extension of all the ad-blocker extension.
Pros. 1. It's too light on RAM.
2. It blocks every add. Either it's intrusive or non-intrusive.
3. It gives you summarized data about blocked ads.
4. The preeminent pro- it doesn't participate in acceptable-ads program like adblocker and adblock+ do.
Cons- I haven't found any con yet.