Those awful random issues described in length here and elsewhere earlier in Vista Explorer were IMO alone enough justification to skip That OS (Vista)*. Unfortunately my tests show they may not have 100% fixed it, only 98%. I still get that "column settings randomly messed up/forgotten" issue in Windows 7's Uninstall A Program control panel. I'd like to have Installed on, size, version etc visible, but it returns to only showing the Name column and nothing else quite soon. It's as if it's not even saving those settings between boots. Though this is Win7RC upg from Vista I'm just about to do clean RTM install maybe next week.
* And no the service packs did not fix them despite ton of complaining. It's still worse in Vista to my best knowledge than in Win7RC.