DBELL  I love iFamily! The program takes full advantage of my iMac's large screen. Its context diagram shows up to 6 ancestor generations for an individual, plus spouse/partner and children, and details below, all on a single screen. Easy imports/exports of GEDCOM files. Powerful comparison features. Great PDF/RFT reports. Neat HTML. I could go on and on.

Perhaps the best thing about iFamily is that the developer, Keith Wilson, personally answers all support questions. Sometimes within minutes! And he is constantly developing new features, included in the very reasonable initial price. He's just released ver 2.402 iFamily for Leopard with totally cool sibling "card" features.

I'm an IT professional. I know how hard it is to create quality software and support it. iFamily is 5 STARS on all counts.  
(Version 2.398)