I've been using Windows 8 Consumer Preview x64 on my personal X201t. My X201t has 8 gb of ram and I used an extra 320 gb hard drive to install the operating system.
I love it and won't go back. So far it has been 100% rock solid with no BSOD. That's using it every day since February 29th.
This Microsoft site has been very helpful in finding out if the software I use will work on Windows 8 Consumer Preview:http://www.microsoft.com/en-us/windows/ ... enter/Home
Windows 8 Consumer Preview overcame one problem I had on my Windows 7 Professional x64 installation. I had a problem with the wireless card disconnecting and reconnecting frequently. The problem began about 6 months ago and seemed to be related to a driver upgrade. Either it has completely gone away under Windows 8 CP or the new driver doesn't report the problem. I think it has gone away.
I had been using Windows 8 Developer Preview on a spare machine from September to February, but it was much too flakey to use on my everyday machine. This is not the case with Windows 8 Consumer Preview. I would buy Windows 8 Consumer Preview today if Microsoft sold it.
I haven't tried the fingerprint reader. I'll do that today and report back.
The camera works fine. The DVD in the base works fine. Office 2010 works fine. My accounting software (Acclivity Accountedge) works fine. I sue VLC for a movie DVD player and that works fine. All my plug-ins for Nikon NEF raw files works fine. Skype works fine. Windows Messenger works fine. Touch accuracy on the X201t is better with Windows 8 than in Windows 7. Touch is better with Windows 8 than with Lenovo SimpleTap. Zune software to link my laptop with a Windows 7 Phone (HTC Titan) works fine. All my print drivers work fine for my HP LaserJet networked printers. Norton pcAnywhere works fine.
I have avoided installing ThinkVantage software so far but I might start giving that a try.
I use Paul Thurrott's http://www.winsupersite.com
for help in learning tricks and solving problems and that works fine.
Having said all that, I spend most of my time in the traditional Windows 7 - 8 desktop and not too much time in the Metro interface. The only application that I found in the Metro world that beats anything I use regularly in the traditional desktop world is the Metro Kindle app. This has a much nicer book presentation than Kindle for PC. The Calendar app is not as good as Office Outlook. The Mail app does not connect to POP or IMAP accounts. But Office Outlook 2010 works fine under Windows 8.
I like logging onto the machine with my Windows Live logon and then automatically I am logged onto my hotmail account, my Skydrive account and my Windows Live Mesh account.
No complaints. I'm not going back. I'm currently trying to decide if I want to buy an X220T now for my next laptop and run with Windows 8, or whether I want to wait for Lenovo to sell a new laptop with Ivy Bridge and Windows 8 pre-installed.