On large solutions (greater than 140 projects in a single solution), VS 2008 is extremely glitchey. When editing a windows form, for example, you may have to wait 20 minutes for the tools window / form to 'rebuild' before you can make changes to the form. Rebuild / builds have to be done selectively by individual project since total solution rebuild can exceed 45 minutes. Perhaps the solution level build could be smartened up ? I know this is an insane number of projects (about 150 at last count) but sometimes you have to work with what you are given. I have worked with WPF, but the VS 2008 support in the visual designer is primitive. You end up writing XAML (which is not what you want developers to be doing alot of) to gain sufficient control. I think WPF is mature but the studio support is not.