I have the latest and greatest 10.5.whatever and while I bought and own the new 10.6 DVD I have yet to upgrade. The primary reason is that I use PGP to encrypt my disks and it is not compatible with 10.6 so I'd have to unencrypt and uninstall PGP Full Disk Encryption. (And that takes DAYS!). Plus, I use Adobe CS3 and I understand that has hiccups with Snow Leopard as well. If you upgraded, would you do it again? To be honest, I bought the upgrade because it was cheap and I like to have the latest and greatest but while this is the latest I'm not sure this is the greatest. (I don't even know what the upgrade offers me!) Your thoughts?