Have you dark hair ? If you do then it is going to make you look washed out, all that paleness next to your skin and hair. you will need a scarf to give you colour in your cheeks which will defeat the object probably ! If you are pale blond or have ash highlights it should work because the delicate colouring will work well.
Regarding shape, have you got a proper waist ? If you do it will make you look squat because it is not tailored but if, like me, you don't have much of a waist / hips, a bit straight up and down but are slim then the shape will work well.
The arms stop above the cuff too so you can't wear just anything underneath.
Hope that helps.