I bought one size up after reading the reviews.  Other than having it shortened a bit, I didn't need to make any changes.  I don't like the way the dress ties in the back, so I may have the sides taken in a bit and have the tie removed.  From the front, it is a very clean, neat looking appearance.  I think the tie in the back detracts from this.  I would buy it again and just have it altered.  I appreciate that it is offered in navy because white can be so much harder to clean.  I usually wear a white scrub coat with it.  A cardigan would be cute as well.