I had fun with this one, my first two-needle coptic-bound book. I used a lovely florentine-style (maybe actually florentine -- it's "made in Italy"!) paper for the outside, and a Japanese print on the inside.
If you zoom in on the picture below, you can make out my stitches. I think it looks a lot better than single-needle coptic, but it's more of a pain (especially as I have only one curved needle, and had to do the other straight!). Pink cotton thread. These colors make me happy!