There are so few additions to Joomla that allow for this type of file functionality, I found the price well worth the expenditure, and the couple wee questions I had.. were answered pretty darn fast and very nicely (and thoroughly).
Thumbs up for sure.
The installation is simple, no tricks needed, or surprises presented at all.
The learning curve is there, but there is good documentation, and the support is fabulous should you need it. Fast and accurate, and that's also something I don't mind paying for, after all, I'm using this software to ... make money. Conveniently.
Once you have walked through a few processes (and successfully linked to them) it makes sense. It allows for almost any payment need to be fulfilled, and includes almost any payment module you can imagine.
This is one of the best component buys I've come across to date. I'm going to by it again, there is never a shortage of sites that can benefit from this software.
Unfortunate I now have a large corporate client that believed me, and had me buy and install it. It worked fine till the upgrade last week. Upon upgrading ... the site died, I was fine to have to re-install and start over but the new package does not install on this system (even with all requirements met).
All that would be fine too if the support was Pro, but it's not. Weekends off, and the forums don't always allow you to post.. but they won't answer emails. I have another client that wants it but I'm hesitant, and they still have not fixed forum access or emailed for support after a week.
So basically, it's great if you don't really need it.