Hey, Bought this script recently for one of my projects and am well pleased with it.
I had couple of issues installing. Had to set permissions to certain folders what is not described in installation guide. However if you know what you are doing, there shouldn't be any issues.
I have also already modified the default functionality to my needs, thanks to very easy and well documented code.
Other then that, will also note that support from vendor was good. Even though I managed to solve issues myself, I did contact them and they came back to me next day.