My mother's dress had the wrong waist size. It was half an inch smaller than what she requested. The waist and hip and neck measurements were all off by at least a half inch on my bridesmaid dress (at least an inch off at the hips to the point that the skirt which was supposed to be loose and flowey was snug against my hips). Plus the dress was shorter than pictured by several inches to the point that it was indecent in the back for a wedding dress. And the waists on both dress were lower than pictured. I couldn't zip mine up and could barely squeeze into it. My mom could get hers on, but it didn't look right.
I'm just not sure how two custom dresses could be so off given that we gave them all the measurements. And especially from a website that seems to have pretty positive reviews.