Absolutely love it!!! Its noticeably faster then Win7 on everything I've tried it on (D630, Lenovo T60, E6500.) I have it installed in virtual box on my personal Elite book 8440p, but I have a 320gb WD Black drive, that I'm going to install and load Win8 as the primary OS, and run with that for a while.
On every install, its found the drivers for my hardware and installed them automatically, except for display drivers but that's to be expected. Every program I've tried works, just as Microsoft said it would. (Sec essentials, utorrent, MS office 2010, convertxtodvd. Haven't tried any games, but I imagine they would work too.
The metro UI is going to take some time to get used to but I like it. I have no doubts that MS will make that optional in the RTM as its pointless on a desktop.