So far I'm finding this technique to be much easier than anticipated. Manipulating the cards is not terribly difficult, and I'm starting to see where I am at with the pattern just by looking at the band. The DH pointed out that it's really a bit map, and for whatever reason looking at the whole thing in terms of pixels sort of works for me. Because each color shift is 2 turns, it's easy to see what you just did and figure out from there what's next. It's certainly easier than some of the textured bands I've been working on, where I can't tell what I just did most of the time.
The one problem with this particular band is the colors. It turns out that higher contrast yarns are needed for this, otherwise you end up with very subtle patterns (as you can see below). On skeins it looked like the pink and light green would would out, but the design isn't popping much at all. Funny enough, the small striped section looks fine, it's only when you get into the doublefaced part that the colors blend together. This band is destined to become a set of garters, so it won't make much of a difference. If I were going to use it as trim or a belt I would be more unhappy.