I have the black "crocodile skin" case. The end product is actually not exactly the same as the mock-ups, for instance mine has a hole in the case where the light sensor is.
Decided on the black one as I think the tan surround may distract too much from the screen.
The build quality is excellent and it appears to work quite well with the cover folded back for typing at a shallow angle. It can also stand upright, but I wouldn't trust it to be too steady if on a train.
The packaging the case comes with almost reaches Apple standards. It's good to pamper yourself every now and then!
As for delivery, I ordered it on the 15th April and it arrived on Tuesday. They quoted ten days as delivery time, so was quite late.
Now to wait for its eventual contents...