Still not as good as snow leopard in my opinion. I work as a AV/IT engineer and have used both for a little while now. To be honest I find leopard smoother, faster and generally a much more polished operating system. I had all sorts of problems installing windows 7 from my previous XP install. It wanted a fresh install then claimed I needed a valid vista install to upgrade from! I know a lot of other people have had this problem too! Theres still a lot of clutter bundled with windows and its takes quite a while to set it up how you want it. It also seems to be slowing down over the last few weeks, a problem XP and Vista both suffered from. I've also had a fair few crashes, especially when installing drivers etc. Windows 7 is definitely a worth while upgrade from Vista as it was literally useless. I still think Microsoft will struggle to persuade businesses, university's etc to upgrade from XP though! As for upgrading Leopard to Snow Leopard, you put the disc in, literally click a few buttons and its done! It boots very fast and the os is very quick and smooth! Having said that I have had two crashes, double what I had while using Leopard last year!