An excellent astronomy package that competes with the high end (Voyager and Starry Night) at a budget price. It's one of the few apps that I've come across that works with Location Services on the Mac, the database (whist not as extensive as Voyager or Starry Night) is better than all other packages I've used, and the feature set is extensive. Has a somewhat quirky interface, and auto-reverts to the last screen you used rather than a default ... which I find a tad different from other packages ... but looks like becoming one of my top three in short order.