I'm a professional fisherman and got CoastKey installed in my fishing boat in July 2018. I use the wireless kill switch around my neck or inside my jacket, and it’s not an obstacle. Often I forget it’s even there. CoastKeys safety system is very easy to use, and I feel secured at sea. In case of a man over board-situation, the engine stops, and I can swim back to the boat. In addition, you can connect CoastKey to other features like start, bow thruster, anchor winch, etc. I highly recommend CoastKey.