What's the consensus on Windows 8 so far?

currently debating on whether I should stick to W7 or install W8 on a new rig I'm about to build. I tried Windows 8 a while back on my MBA and found the new UI and navigating it quite jarring. Has the experience improved at all in the last few months?

What is it about W7 or W8 that you prefer over the other? Any usability tips & tricks you wanna share?