OP the dress is beautiful....But.....
You MUST try it on....I had a vision of a certain dress for years....until I tried it on....then ICK! As a matter of fact, the type of dress that DID look good on me was very similar to your pic, but not as much rouching (spelling) or all the details at the top, but the neckline was the same. But it was something I hadn't dreamed of seeing on myself. It was a Maggie Sottero.
Try on the dress or dresses like it, and see if the style fits you. If so, great! Wear it....f not, be prepared to be very open with different complimentary style choices.....Your day, your dress, your way.