I like the app, but you can find juice recipes free all over the Internet and in Joe Cross books (which I also own).
The key feature that I really like is the shopping list ... just pick out the juices you want to make and add them to the list. Its easy to delete them or cross them off your list, whichever you prefer. Is this feature worth $15? I dont think so.
While I can afford $15, I think the entry fee is too high for many people. It needs more features. Here are just a few:
1. Allow me to make notes about the recipes
2. Make it a universal app ... plenty of iPad users out there, too (like me). Let us take advantage of the extra real estate!
MacMiniMe about 101 Juice Recipes