In the USA Today Personal Technology Column this week, Ed Baig talks about his experience upgrading to Windows Vista. He has some really complementary comments about Aero in this write-up:
The Aero interface is handsome. Users will appreciate translucent edges, live thumbnail images that appear over taskbar items you mouse over, and a 3D effect that lets you use the mouse scroll wheel to flip through a stack of open windows. You can also hit Alt + Tab to flip through windows.