Works well, uses less memory, doesn't get unresponsive like other ad block solutions do. I like it.
However, it causes lastpass to not function properly. When you have a login dialog lastpass usually has an asterisk next to the username and password. When you click the asterisk, you get the logins lastpass has for the site and you choose one and are logged in.
With this active, this does not work, the asterisk turns to an X when clicked.