The slight taper on the shift makes the shift style more flattering because it creates a bit more of a waist and flare than a traditional straight shift dress
Shift dresses are sometimes tricky for some body types, but the material of this dress and the shape lets the dress be flowy and not too boxy even on curvier shapes
The dress is good, but not perfect for shorter women and may not drape as well. Since it's already fairly expensive, it's not worth taking it in if the fit isn't great.