Looks like everybody's experience varies, I did a clean install of OS X 10.2.2 a few days before updating to 10.2.3. I noticed a much faster 'zoom' in opening and closing finder windows, better use of letter shortcuts to locate files in a open file list, faster printing reponse. 10.2.2 was giving me the 'loser lollipop' quite often in various apps, I no longer see that at all. I also now have the fastest boot up ever, to OSX on my system, (I've kept track since OSX PB) This last 'small' update gave me the largest apparent change in operating speed since 10.1 Not everything is perfect, I got a 'please restart your system' window, which seems to be the equivalent to a kernel crash or whatever. I probably don't work my system as hard as some do, I haven't had a lot of problems since 10.1. Now that operation has significant improved, even using classic isn't much of a chore (I'm still using MS Word 98, waiting for that to stop woprking with some future update of 10---so far, so good!) comment - Seems to me that a basically crashless (some will argue this) system, more than balances out a slightly faster user experience. face it, OSX draws your windows very differently than OS9, Is that the only way to compare the 2 systems? I would say, no! The crack about the no-button mouse? The pro mouse has no visible buttons already. I prefer a 2-button with scroll wheel, which is not yet perfect, but not everyone needs those functions.