I absolutely love windows 7 I've had it since before the public release. Used the beta on a school computer and when it was released thru MSDNaa (Microsoft Developer Network academic alliance) immediately upgraded my vista x64 laptop to win7 pro which I love since it Microsoft finally got their act together and made cascading features up through the line of products. In other words, pro has the same exact features as home premium but with added features; winXp mode etc.
With so many new features like jump lists, windows snap and the wiggle thing It is very intuitive and streamlined not to mention windows 7 is designed to work on computers with lower system requirements so you can install it on older systems or netbooks.
I am an IT professional with multiple customers. I would recomend windows 7 to anybody who are tired of all of the headaches from previous Microsoft operating systems.
The only problem I've seen at least with my installation is that when I try to go into sleep mode an resume I will get a blue screen which has to do with my older graphics card which is not win7 certified but hibrnate works fine which is totally fine since i'd rather use hibernate anyway.
Sorry for the long post. This is just something i'm really passionate about.