I've had an Advent 4211 for nearly two months (I bought one within days of its release).
I'm very satisfied with my purchase. It's a great little machine. I just wanted something cheap, light and fun for web browsing and Skype chatting, and this fits the bill.
It's not perfect; it does have flaws. Its wireless reception is pretty lousy, the battery life on the 3-cell isn't good enough, and it can't play high-res video at full-screen. But I still like it.