Admittedly, most of the functions of the timer brings my camera (Nikon D5300) already with on its own. The great advantage of the timer is, however: I can break long continuous shooting (time-lapse) easier (I have the camera to not turn off) and I can (if the intervals are long enough) and in the meantime look into the menu times. This can work but much more flexible, as the camera features alone. The backlit display reduces night the need to use a flashlight.
