Love this dress so much. I'm a 12-14 so ordered the M but I wasn't 100% sure on the fit so ordered the S to try that too, and preferd the S. There was still plenty of twirl and lift in the smaller size which was confirmed by the impromptu gust of wind as I walked down Chester highstreet.
Loved the colour and the quality of the fabric is amazing. I just found the sleeve shoulders/bust area was just quite gaping if I sat down and a bra strap would appear every so often. The elastic feels quite loose and I think could do with a bit of adjustment so would consider sizing down next time to see if that helps!