Short, but comprehensive review: http://www.bit-tech.net/bits/software/2009/10/22/microsoft-windows-7-review/1
Need to know more Win7 tricks? Check out: http://www.techradar.com/news/software/operating-systems/50-seriously-useful-windows-7-tips-528483?artc_pg=1
In all honesty, personally, if I have an extra $150 lying around, it would be a no-brainer to pick a Win7 x64 copy today. Like, now. This minute. It’s what Vista should’ve been, and XP’s couldn’t even dream off. Unless you’re sticking with a Mac, (or flat-out broke like me) there’s no solid reason whatsoever that you shouldn’t be using Windows 7 in the very near future.
edit: Sold more in 8hr than Vista in its entire pre-order availability? Man, I should’ve bought some Microsoft stock options. Read: http://www.bit-tech.net/news/bits/2009/10/22/windows-7-more-popular-than-harry-potter/1