I have helped in changing two of them and the most difficult thing was getting the old one out. I specifically mean undoing the electrical connection of the old switch. It is difficult to describe but the connector is set in and is in two pieces, and you need to use something like a small screw driver to get the little latches that hold it in to release and pop out. Once that is done the new pnp bits snap in nicely. That difficult disconnect was the only part that stumped me for a while. Maybe someone else has some ideas on that.