How is Windows Vista Service Pack 1 running?

Microsoft on Friday made available to the public a pre-release version of Windows Vista SP1. We want to know what you think, assuming you're willing to install the beta.

Service Pack 1 -- due out this quarter -- is slated to bring a number of major improvements to Microsoft's flagship operating system, but mostly behind the scenes. Performance and reliability has been boosted, in addition to improved compatibility with applications and drivers. Vista users have been clamoring for SP1 since the OS debuted one year ago, so we want to know: does it live up to the hype? Leave a comment below with your experiences, both good and bad.