Had a little test and it is very good. Wish it was cheaper and I would buy it (I have bought most of the Ample Sound guitars as their pricing point is around the price I would expect to pay). I wish I caught the Intro pricing (don't know how much cheaper that was) but as I buy lots of music mags and am on the internet music site a lot, this must have been Very Low Key Advertising at the time, as the first I have ever heard of it was this week in a music magazine advert.
Anyway, now that you have built the engine it would be good if you (like Toontrack Superior Drummer/Ez Drummer, do for drums) create expansions of different types of guitars and extra patterns/riffs that would create bigger funds and should be much easier now you have the Engine/product to host them. Which again brings me back to the pricing. It should be cheaper to start with, with lots of paid for add-ons to provide more and more funds. I personally would buy the engine/original program and then probably, time after time, buy all the expansions (resulting in me paying more in the end up and you getting more funds in the future. That just the way marketing works for people. We pay more bit by bit, rather in a lump original outlay. As Toontrack, UVI, etc, have used to their favour, as it works.
So, for now, let me know when you next have a sale