OK... so first disclaimer: this sweater is not the same one from the website. I didn't see the exact one the website shows (I scoured the racks, even behind other items)-- this was all there was. So in reality, I can't make many judgments on the online version. This one is very similar, but many of the super-pretty details the online one features are missing on the sweater seen below. Also, it's about 5 inches shorter. Which might be preferable to some, but I'd prefer it longer.
Although XS isn't an option, the S fits all right. Especially with a long sleeved shirt underneath. I think I actually liked the black better, even though online I didn't even give the black a second-look. All in all, I definitely didn't purchase the one in the store, but I'm still not convinced I wouldn't like the one featured online. In other words, I still have hope!
p.s.: Didn't try on the sparkly shift, but it was very pretty in person and would look so fun with tights and heels for a party!