Hide your Motion Sensor inside a standard single-gang SG/MY/UK box, with the main body of the sensor inside.
I didn't like the pill-shape and how it sticks out, and I also found the sensor to be over-sensitive to a certain angle. Hiding it inside this single-gang faceplate (printed in the same colour as the wall) makes it less obvious and more hidden.
The hole is offset to allow for the motion sensor to sit flat on the faceplate at an angle. I used some thin adhesive to hold it in-place and it has held fine vertically + horizontally upside-down for the last year.
The author remixed this model.
Added hole for the motion sensor PIR to go through