I've been using this program for approximately 1 month now. The software has given me no stability issues and for the price is an excellent deal.
My favorite thing about this software is the calendar. It's much better and more useful than OSX Calendar. The daily planner also has a great layout. The look and feel of this software is extremely professional, intuitive, and has some nice touches (including adding professors and the ability to turn off the "grades" feature).
I don't really have any complaints about this software. More just "wish it did" type stuff:
- sync (export) school calendars to OSX calendar
- a way to setup repeating assignments
- attach files to the assignments and classes
- keyboard shortcuts to make inputting assignments easier.
With the software being priced at 10$ it is a great value. I also have the iOS app and it too is priced very reasonably and performs well. However, I would be willing to pay 3-5$ more to have a few more features like the ones listed above.