After 8 surfs with a Shark Shield, I am beginning to think it is worthwhile, despite the occasional electric shock. It is possible to turn it down, but that would also reduce the size of the electric field protecting you. The weight of the battery is noticeable, but you get used to it. The best thing about using a Shark Shield, especially at a place renowned for shark attacks, is the feeling of being a lot safer than if you were not using one. You just feel more at ease knowing that an eventual attack would probably be averted or at least reduced in severity. Other advantages include surfing in conditions that you might not otherwise consider safe or else not worth the risk. And then there is the peace of mind you give to loved ones, who might be concerned for your safety, and a significant reduction in any guilt you might feel for risking your life just to go surfing. Seriously, what is the world coming to when you have to surf in an electric field just to feel safe?