Quality can be very inconsistent with some brands - but I would not pop Kamalikulture dresses into this category. I have seen many of them, and it struck me how consistent the quality was actually is. Good. Otherwise, I would not be wearing these frocks. Perhaps I got lucky. But I have not seen problems with seams and hems - yet.
Suz, I have both K dresses in an XS. They do not cling, or feel too small. You have seen the one on YLF already, so by all means you be the judge of fit. I have dresses that fit tighter than these frocks too (I don't like them nearly as much). I do not have curvy bombshell real estate so I guess that helps a bit with the fit and size. If you do have curvy bombshell real estate - you might need to size up on these frocks. Some of my clients did just that and it worked like a charm.
I hope that's helpful info,