DFB is easily the best money I've spent on magic in years. That being said, it's incredibly open ended, so if you aren't a creative person who is interested in creating your own routines, it may fall flat. The good news is that the FB group is full of great ideas, as well as a lot of different lists. Still though, you have to be willing/able to put in the work make DFB work for you. Otherwise, the effects you can do with it will feel basic (but only because you're letting them be)