I got a cyan Lumia 800 the day it hit the shelves, and I am very, very happy with it. Yes it has its flaws, as does iOS (own an iPhone, too), as well as Android.
But the user experience is really great. I dont care if it has dual core or not, everything's really smooth, no hickups. Touch keyboard is very accurate (most important thing for me on a touch-based smartphone).
In terms of build quality it is IMO superior to anything I've seen yet. And I really do like the color, it stands out the crowd.