I think APP is a great tool. You can produce good enough data, with very little effort. However, I think the precision of PI and what you learn going through its massive learning curve makes you a better astrophotographer in the end. With that said, I hear that PI's mosaic capabilities are far too difficult on people, and that APP shines when it comes to mosaics. So at this point I own a permanent license for both, as I see value on both ends.
Where did i left my credit card, time for new order.......
I think i have to have a collection of AP programs too then, anything that can do the job or easier to use or less learning curve is welcomed, after all it is an affordable price too, even PI Iic i bought while i am still a beginner, hehehe