I upgraded to Leopard

I upgraded to OS 10.5 (Leopard) last night. No serious problems, easy upgrade process, and my Macbook Pro laptop definitely seems faster using the new operating system. My observations:

• Before the upgrade, I moved off some data files to ensure I had sufficient disk space. I took all software patches from the various vendors (Apple, Microsoft for Office on my Mac, Parallels, AdiumX, and so on). I also did a backup of my data files.
  
• I have not installed any unusual software on this Mac laptop. Unknown if that made my upgrade be fast and successful.
  
• I rebooted just prior to the upgrade to ensure most applications were stopped.
  
• Total time to upgrade was approximately 90 minutes.
  
• Seems to be a tad higher on memory consumption. Nothing drastic, but now I'm thinking I'd like to increase from 2Gb to 3Gb of memory for when I have everything running (including Parallels).
  
• As of this morning I only have a slight problem with the third-party chat/IM client AdiumX - it connects to Google and Yahoo, but not to MSN.
  

Leopard spanks Vista

So says this ComputerWorld article.

As for me, I bought OS 10.5 (Leopard) but will likely not upgrade until the end of November (read: I rely on my single Mac and will wait for the 10.5.1 set of any fixes to appear)...