TechNewsWorld had an interview with Steve Ballmer. Here's a snip about what he had to say about Windows Vista:
Q: What else would you say has been an unqualified success of late?
A: Since [we updated it], I'd also refer to Vista as an unqualified success. It doesn't mean that people aren't still picking on it, but we've sold 180 million copies, something like that, of Vista. The quality, the compatibility [and], particularly from the consumer market, the level of acceptance -- I'd call it an unqualified success over the last six months or so.
Our Media Room software for set-top boxes, [Internet protocol]-connected set-top boxes, is certainly an unqualified success amongst those people who have it.
Office 2007. The changes we made in the user interface, the approachability of the product, the ability for people to get deeper -- I would call that an unqualified success.