Rated 3 out of 5 stars
Played around a few minutes with this add-on, but could not get it to do what I wanted - which was to rotate my favorites (that I have collected on GetPersonas). It kept on asking me to log in, while I was already logged in.
After install it starts rotating immediately, picking any random persona, and these include personas of girls in bikini (as mentioned below by someone else already). Although this is clearly not done on purpose by this add-on.
I turned rotating off, then restarted Firefox, to discover that it was rotating again. But the menu said "Enable rotation".... I had to enable and disable it to stop. I restarted Firefox again to see if it would happen again, but it did not start rotating again. Maybe a one time thing.
I tried to make it use my getpersona favorites again after this restart, and again it did not work. So I've disabled the add-on.
3 stars because it's a good concept and although it's a pity that I couldn't get it to do what I wanted, I don't think it's anything that can't be fixed. I'll try it again in the future.