I am in love with Op-Art. It is such a cool pattern. Less cool? Weaving in all those darn ends. Next time I'm going to check out TechKnitter before I start - she's got some cool ways to avoid all the weaving. And yes, there will be a next time.
I love how it blocked out - I was really unsure if I was going to manage to square it, but it got there in the end. Thank heavens for blocking wires.