So far, it's been a complete disaster. Outlook is buggy, crashing on occasion. The calendaring has been terrible. People have ended up going to meetings that didn't exist, not going to meetings they were invited to because it didn't show up, missing meetings that were moved but not updated on anyone's calendar, and so on. At least Meeting Maker only crashed on us.
LOL. Bingeley Bingeley Beep? <g>
Sorry, just been re-reading some Terry Pratchett and couldn't help but be reminded here of Vimes's Disorganiser.
LabRat