It has amazing support, specially considering it's non-commercial! Each time I had a question I just had to send it through the contact form in the site and I received immediate and very efective help.
I didn't rate it "excellent" because it isn't multilingual friendly. My site is in both English and Spanish with the help of Joomfish. But I wasn't able to make the extension correspond to the visitor's language: English or Spanish.
Still, being non-commercial I really don't complain!
Thank you for your review