@howarmat(te) & @Stygian are right on the money. Very similar finish to satin if you've got any of those on hand. It's a matte type finish, but no streaks and a higher luster that lets the colors pop through.
Streaks and dull colors are the worst. I'm guessing it's more costly, because I can't think of any matte release that wouldn't look better with a zero/satin finish.