Review on 5Pcs 19Mm 12V 24V Waterproof Latching Push Button Switch With Wiring Harness And LED Indicator Light, Pre-Wired SPDT Self-Locking 4 Pin Marine Metal Switch For Boats Cars Trucks (Blue) by Kev See

I dislike the design of this button. In order to turn it on, you must push the center below the top surface. Unless you have very pointy fingers, this is actually difficult to do. Properly designed, the button should sit proud of the main surface in the off position, and flush with the top surface in the on position.