Installation was quick as installations go (though it was a bit disconcerting that the initial time remaining was "5 hours and 23 minutes", (dropping down to 19 minute left after about half an hour). I learned the importance of reading details first before acting. Bought the family pack before I discovered the processor speed took out four of the five candidates for the the upgrade. Time Machine was a simple as clicking okay, then letting it build the back-up overnight.
Two things that weren't entirely clear before I did the install (again need to read better) was Leopard's inability to deal with OS 9 apps, and Apple's Filemaker Division's decision to orphan everything prior to the current version (9). Filemaker has publicly identified at least two features that Leopard breaks and will have a patch in about a month. But will not provide a patch for versions 8.5 or earlier, nor will they do any testing of earlier versions. Their customers must upgrade or else FM may not be completely functional with Leopard. Unfortunately, the FM 9 upgrade was significantly more expensive than earlier upgrades.
Two things that weren't entirely clear before I did the install (again need to read better) was Leopard's inability to deal with OS 9 apps, and Apple's Filemaker Division's decision to orphan everything prior to the current version (9). Filemaker has publicly identified at least two features that Leopard breaks and will have a patch in about a month. But will not provide a patch for versions 8.5 or earlier, nor will they do any testing of earlier versions. Their customers must upgrade or else FM may not be completely functional with Leopard. Unfortunately, the FM 9 upgrade was significantly more expensive than earlier upgrades.