I bought this top in the sleeveless last week and am wearing it now for the second time. I love it! The back is semi-sheer, so it's been great in the Texas heat. My shopper at Nordstrom recommended an olive green jacket with this, which is how I wore it today. I bought it in plus - fits slightly large, if anyone is thinking about it. Oddly, the non-plus size (don't see the plus online) looks like it has a pinkish inset in the neckline, whereas mine is black.
Very much looking forward to seeing your long-sleeve version!