Here are a few more of the comments,reviews,and general suggestions that I have located concerning Vista and the chore of updating. Now keep in mind these are quotes of professionals and not my quotes folks. Here are some of the drawbacks.
Gratuitous UI changes. I love the user interface, but I have a lot invested in the old Windows experience, and some of the changes just make no sense to me. It also seems that, given the size of some of the targets you have to home in on with your cursor, Microsoft is hiring a lot of young workers who have great eyesight and use high-resolution monitors.

Performance. All this goodness comes at a price. While most features are enabled to some degree on stock PCs, older machines just won’t be up to snuff. If you want to run the latest and greatest with all UI features enabled, you’re going to need an upgrade. Older laptops in particular are unlikely to be able to run Vista well with all the UI stuff turned on.

Compatibility. This is not a new problem, but Vista will confront business users for the first time in a long while with major backward-compatibility issues. In general, drivers and low-level utilities will be the worst hit, but all critical applications will need to be tested carefully to see what works and what doesn’t.

The bad: Windows Vista Home Basic does not put Search on the desktop (it’s buried within applications, within the Start Menu); no Aero graphics system in Home Basic; no new software yet written exclusively for Windows Vista; optimized only for the Microsoft Windows ecosystem (for example, RSS feeds from IE7 get preferential treatment); and little reason to leave Windows XP.