This is the most painfull install I've ever been through.
First I had to install the prerequisites to the prerequisites, then the prerequisites, then the software, then the MSDN library. At the end of the 4 hour process, when I thought I was finally done, I launch the application, only to be informed that the CD key I entered is invalid, and no way to re-enter it. It appears I have to un-install and re-install in order to be able to re-enter the key. What a nightmare!
I've installed it a few times now on machines running XP Pro +latest updates SPs etc and have not found any of the problems you guys mention. The installs were pretty smooth and definitely not 4 hours.