I really disliked the way OQ operated outside of curse basically so that it could beg for donations.
I also had regular issues with it due to the constant patching and the odd glitches it could cause.
Even when it worked it was kind of hit and miss. I got frustrated, uninstalled it and used Openraid for the rest of MoP.
Great idea at the time, if you could deal with the hassle of it it was really useful, but I'm not keen to install it again unless it's radically different. Group finder does most of what OQ did for me, and for everything else there's Openraid.