I bought this dress as a sample from Gabriella Bridal Salon in New York in February 2020 and have since had it dry cleaned. It is completely unaltered.
As you can see from the pictures, I absolutely loved it, but our wedding ended up falling victim to COVID (was supposed to happen September 2020). It has not been worn since the pictures/video attached and was dry cleaned in November 2022.
I am 5'4", wear a 34C, and typically wear a size 2 or small in street clothes. The dress fit me almost perfectly on top except the straps were long (they are clipped in the photos). It fits me perfectly around the waist. There is TONS of extra length for alteration.