I just purchased these for my girls and gave them to them yesterday! I can't say what their feedback has been as I haven't recieved any yet, hopefully that means everything is perfect! haha! I can say that they are made well, the material is good quality, not a jersey cotton type material but a more slinky, flowy material. They are made with lots of material so there is sufficient coverage, I can imagine they would be perfect on any shape!
I am pretty sure the only store that they have them at is in Ontario in Canada, I am from Canada and couldn't try before we bought either. They do have a decent return policy though, so you can always buy just one and see how everyone likes it and if it doesn't work you would only have one to return instead of a bunch!
They have been offering free sample swatches recently, which is how I confirmed I wanted the dress for sure as the plum colour was perfect! I also got a few other colors and all of them were very nice!