First, I would like to thank EFF for this add-on.

The GUI would need some work, it looks 1995.

it doesn't block "everything" I prefer to block all Google stuff that I cannot block in my router but this doesn't block youtube ads and ads spies on you ;) (i know this is for privacy but ads on youtube makes so many ajax calls its ridiculous - and we know Google love knowing everything)

4/5 I would recommend but need another extension to fully satisfy my intense browsing

Maybe add a opt-out feature for ads that tracks us