On a Macbook Air 13 inch, found that the image either has to be a bit away from the apple logo or from the edge of the screen. The sticker itself is not opaque but translucent, and has a 2mm transparent edging. You therefore don't get exact image as depicted.
That being said, the slight transparency allows your expensive aluminium to be seen and if I hadn't seen this image would have thought it looks great. To any friend who sees this on my laptop, they think it looks great.