OK, I've now spent some time with this, and although it seems daunting at first - so many options - once you set it up to your liking, you'll wonder why Apple has not (yet) bought this great app for the next version of OS X!
This is a fine example of how someone takes the foundation of an Apple feature and making it 500% better.
Try it, and if you can't afford it, enroll in school and get the student discount :)

My only suggestion is to lower the price so more folks can (and will) buy it.
Also, a full timed-demo would be better for people to test it out.

Scott