I ordered this dress online in order to get a petite size and am very disappointed. as other reviewers have mentioned, the fabric overlay is very different in person than it appears in the online pictures. the dress is much more casual and looks cheaply made in person. 
as for sizing, i ordered the 2p based on other reviewers' comments about it running small. the 2p fit me fine, although it was very fitted in the chest and i am very small chested #32b#. i can definitely see that being an issue