My Leopard experience: I pre-ordered Leopard the split-second it was available. I waited gleefully for it to arrive. While I was waiting, I backed up all my important data (as I do every week), so that I could do a full erase and install. After it installed, I was very excited about Stacks, Spaces, and the new Finder. QuickLook is awesome too. The past few weeks have been pretty bad. Sluggish performance, intermittent freezes when using Safari, and seemingly constant hard drive grinding are the major offenders. Why does it have to access the drive so freakin' much? I have 2GB of RAM in my PowerBook, and there aren't many page-outs happening. I think... ahh.. the .1 update should polish this off nicely, fixing most of the problems. Nope. But now I am privileged enough to have Disk Utility work properly. What an honour. Although it takes about 25 minutes to repair permissions. Anyway, repair permissions didn't work. Tried resetting PRAM... hey, it's worth a shot. Nope. I have to actually reboot my computer once every day or so. This was something I was used to back in my Windows days (been a Mac user since early 2006, so I'm not a total noob), but I have learned to expect more from OS X. So, after my exams are finished, December 13th, I will be doing an erase and install of Leopard again, and installing the .1 update directly after installing. I will give it a good chance. I really like the features of Leopard... QuickLook, Mail (absolutely awesome), Spaces... But if Leopard doesn't prove itself, I will be forced to 'downgrade' to Tiger.11. The .11 update sounds like it really solidifies an already near-flawless OS. I will then wait until the X.5.2 update is released to consider re-installing Leopard. Sorry for the length of my post. It would be interesting to see if others have the same experience as me. Look in my sig to see the specs of the PowerBook I am referring to. The iMac seems to be doing just fine... Any feedback is greatly appreciated. PS: This isn't a 'troll' post. Look at my post history to see that I'm not some guy trying to incite angry responses or trying to convince people that Leopard is junk. It's not, it's just not up to par with my Tiger experience.