Very good Rated 4 out of 5 stars
I am sad to say that the whole Noscript/Adblock Plus debacle (you can easily find the details online - it is old news by now) hurt my trust in this add-on.
Still, I am always glad to see the constant updates (I refuse to believe that they are, as some maliciously claim, just to get the update page to show) and attention to detail. I hope, that in time, I will start to trust it as completely before. On the other hand, it is a good reminder to trust no add-on unconditionally.
Notwithstanding all that, I feel that this is an essential add-on. A bit hard to use at first (because it handles rather technical issues), but a powerful tool if you take the time to get acquainted with its functionality.