I adore this dress and you do not need to be worried about the quality.  It is as gorgeous as shown.  I am between a size 14 and 16.  I thought I'd try the 14 and hope for the best, and it was too large, even with a tight laced back.  I saw this dress while looking for jewelry and bought it with enough time to have it delivered, but not enough time to exchange.  I did not get to wear it, but would have loved to if I had the right size.  If you are considering this dress, I'd go a size smaller; the lace allows you to let out where needed and to tighten where needed.

Sad to send it back, but if I have another formal event, I will not hesitate to order a 12.