This is as good as it gets for astrologers using Macs and could be the envy of PC users as well. It is accurate, intuitive and computes just about every astrological function you can think of. All graphics can be customised and the choices are outstanding. Some astrologers have bought Windows-based PCs in order to use Solar Fire or Matrix. This is not necessary. You can have professional astrology software on a Mac and this is it. And no, I am not on their payroll, just an appreciative user. Highly recommended.