I was really looking forward to Visual Studio SP1 and .NET framework SP1 release and resisted installing all... the betas!
However, I am really disappointed with the quality of the the installation experience. I have tried the ISO download, the full download and the bootstrapper installer. Nothing worked. I have run installation with and without running the preparation tool first. Every single install terminated with a fatal error. The log files did shed some light on the problem, but searching only revealed cryptic references to a corrupted registry key related to the installation of .NET Framework 2.0 SP2.
I would love to install SP1 on my main development machine especially for the ADO.NET features and Dynamic Data, however, I cannot sit through another futile installation attempt.
I think I can wait for either the next version or Visual Studio or for the next time I rebuild my PC and do a clean install of the SP1.
BTW, Vista's complete PC backup and restore saved my bacon twice today, rolling back my machine to its state before the "install" of VS 2008 SP1.