Noah arrived 9 weeks early, and a regular issue with premature babies is that they need to be regularly 'rotated' in position as their skulls are still so soft to prevent flatness and normal skull shape development. In hospital this was done by the nurses, who on the whole did a really good job, however Noah loves to sleep on the right side of his head (despite how carefully you'd move his head so it was on the left) and there was quite a pronounced flatness to it and on the back of his head too.
Following the use of this pillow his head is an excellent shape. We can't be sure if the shape of his head would have sorted itself out naturally but it wasn't a risk we wanted to take. Although, possibly a little expensive this is a superb pillow that has done exactly what it's set out to do. It's genuinely breathable (the first things I checked when we brought it home by putting my face in it and expressing genuine surprise at just how breathable). It's quick drying when washed. No complaints from the boy who's head is a really great shape now.
As he's gotten older he's wiggled off it once or twice but only on really restless nights. I should imagine this same issue would be experienced with all pillows of this type.
We'd highly recommend this.