Only dont like the pre-sale i ask different question and never got an answer. I think the know are the only multi-criteria rating extension and don´t need answer pre-sale question. The other think i don´t like was his payment system, i use paypal and i have a international credit card i need to register on visa to take a number for buy the component to many steps i don´t like the visa page but they force to use the visa page. With paypal you buy in 2 minutes but with this system i lose about an hour only for buy a $15 components. This was my experience The componet excellent but the costumer experience horrible
I only had a problem and solved smoothly.
I'm a Spanish user and icons do not accept accents or ñ, i send an email to the developer and in two days I had a new version with this problem fixed.
Highly recommended for those who wish to work with Joomla and custom panels for their customers or to those who need custom handling many shortcuts.