Brilliant! I use the medium level of blocking, took me a while to get the hang of it, there is a very good video online by the 'disliked' one, who takes you through the different levels.
Wouldn't be without it, the more you get into it, the better it gets.
Update: six months on from deciding to go into medium/hard modes, it has been worth the time and effort. I now have a relly good understnding of being able to 'read' websites and know what needs to be done, in terms of the settings.

It's defintely worth the effort to get to grips with uBO.