Does what it should - blocks a lot of unwanted popups without calling those most annoying messages 'Disable your adblocker or you won't see anything'.
However when I want to open a new browser window (via it is quite annoying this also gets handled as 'unwanted popup'. I have to disable the popup or at least the 'block new window' feature to get my second browser windows. I consider this a bug that should be ironed out.