First off, their technical support/Install team is top notch. Where else does your purchase price also include installation? No waiting on the phone with these guys, no unanswered emails, I have a request and it is answered immediately. Truly top notch service.
That being said, this program does what it says it does. We work with models developing pay website that are paypal payment subscription based. We have had no problems with this program. If you are developer, I would suggest ordering three or more at a time and taking advantage of their discounts.
Wish I could go into the technical aspect of this program, but I can not, that is above me. However, that in and of itself is a good thing, this program works without requiring a Comp Engineering degree!