I watched The World Cup using this proxy. Sometimes I went over the limit (1,5 or 2 Gb), but, as I understand, they have a soft policy about that, and block you (for 24 hours), I would say, very far from that limit. Which is great.

I need to cheat only my geo location and this addon is doing it well.

Only one thing bothers me. It applies proxy settings for all tabs, windows and private windows and becomes off when you restart the browser.