I bought mine in Taiwan for about 370 USD, which is cheaper than how much it costs here in Australia (around $450 + delivery). I got the 64GB version.
So far so good. Actually, very good. I think the size is perfect for browsing, reading and note taking. The active digitizer, of course, is the killer feature. The OneNote app is fantastic (and good to have the full version available too - free).
I'm also very impressed how well Windows 8.1 works at this size. I was already a fan of the OS on my desktop but now can appreaciate how well thought out the system is for touch.
PS Shouldn't WP Central open an Asus VivoTab Note 8 forum?