I used the
Windows 7 USB tool, which all went smoothly. I had an issue trying to boot from it when I was using a USB3 port but I just plugged it into a USB2 port and the install went fine.
As for Windows 8 itself, it's an improvement over the developer preview but it still feels very clumsy. Basic tasks like logging off and restarting the computer are needlessly convoluted, while there are numerous references to "tap" the screen. Clearly a lot of optimisations have been made for touchscreens—which isn't a problem in and of itself—but a lot of things just aren't intuitive; for instance: the lack of a start button; trying to find applications not pinned to the start screen; trying to close a metro app (very tedious if you try to use the top-left cursor method); trying to open the Charm bar, etc.
It really has potential but at the moment I think it's going to cause problems for most desktop users. Tablet / touchscreen users will love it.