Dressmakers, Tailors, Dress designers - Looking for advice

[procon]

3. Have you looked at yourself in the dress with the hem length you want?

The store should help pen or tape up the hem to where you want it, but don't just look at yourself in a mirror. You'll look different in a photo so take several views from front, back and sides and then study them with your family and friends to see if the look is actually what you intend. Depending on the style and cut, shortening the skirt can really change the silhouette, making your bottom half appear much fuller and rounder because the drape of the fabric has changed.

Personally, if you like the longer length, I'd say wear it as is. Just have the hem adjusted, which most people would need to do anyway, so you can walk and dance without worrying about it.