This is a great first version! I look forward to the product as it matures. It is just a little bit slow on my PowerBook G4 1.5 GHz, and ran great on my G5. This is going to fill a need for me to maintain family printed photo albums and it could even work out for professional applications. To be fair, most programs that deal with photos can be a little slow as the program reads the photo files.
I think it helps if you use a program like iPhoto Buddy to keep your iPhoto library rather small. Perhaps just have photos in the current iPhoto library that you want to place in the photoprinto album. Or use a folder to hold the photos you want to include. It helps to make sure the photos are already in the order you want them in the album, but this is not necessary.
The program is not completely intutive, so be sure you read the help file. Give yourself some time to play around with it and become familiar with it, and I think you'll like it. It is definately worth the time to learn. I'm going to purchase it as the price is good, it fills a need for me, and I'm sure it will mature into a great product.