I have been using Snow Leopard since release on my Imac and Macbook Pro. (clean install on both) I have come to one inescapable conclusion.... this is a silent open beta test. I have had more beach balls and program crashes on both machines than I have seen since using Windows ME. Don't get me wrong.... I think overall it is a good release, but it is definitely not nearly as stable as 10.5 was. It seems to me that Apple was falling behind. They needed a 64-bit operating system. They needed to ditch the PPC code completely. They needed to build support for multiple core processors as a standard. In order to do that they had to re-write parts of the OS (i.e. Finder) and applications from the ground up. Obviously this was not something that could be done and be bug free on the first release. I think this was also about forcing the hand of developers to get on the 64-bit band wagon. I think this release is totally about bringing in new technology at the expense of stability and compatibility until the next major 10.7 release. I also think they are still testing and building compatibility with older Macs. This would explain why so many users report such different experiences. Even I have noticed a significant difference between my two machines. For example, my Imac has considerably more beach balls on average than my Macbook. Really I see this as Apples "Windows ME". I think they basically built in a bunch of new technology support (and are still doing so such as adding OpenGL 3.0 support on the coming update) and got it working "good enough" until they get all the bugs worked out probably by the time 10.7 comes out. Right now I see this as kind of an unofficial open beta test. Really I am not complaining. I still use my Imac 95% more than the Windows 7 machine that sits next to it. It is just an observation. My Imac experience would be a lot better if I went back to 10.5, but I'm a sucker for having the newest operating system. I just hope that apple really gets this thing rock solid again come 10.7.... and I hope they take full advantage of all the support they have built in for new technology by then.