I use this at work. Bugs my IT guys. I find that not every website or every functionality on each website will work on this browser. I still have to "unblock" the shields for some sites to work and others I can't use at all -- like my online banking.
But I do like to see the tally of everything that is blocked on a regular basis each time the browser loads. Most of the time it's faster.
True I did have issues with some popups but after fixing that it seems to be the fastest