I've been using it for quite some time now.
I have a few issues with it.
1- People know that you rated them and know what rating you gave them. That leads to a lot of "lol wut dat" and "dude why you gave me 2 for att lol wtf". People that I rate badly tend to be obnoxious noobs and I don't think I should pay for rating them badly. Solution : you can still try to spread the love by sending them a /t where you mention your addon, but don't tell the ratings. Like : "<name> rated your skill and attitude in Heroes."
2- The option to rate people is not present when I right-click on their portrait in Pitbull 4. I have to click the pug, type /heroes r, then rate them. Could you check if it's a compatibility issue between both?
Thanks for the great addon, I enjoy it a lot.