I have been bass fishing for less than a year now. I bought one in July and don't fish without it. I normally fish with it on the shad subtle setting and adjust the volume depending on the depth and wind conditions. I have had bait fish jump into the side of my boat several times but I believe it covers the noise I make more than anything. I fish a 60-80 boat tournament every month on Lake Kissimmee and the last three months I have come in 32nd, 22nd, 13th and have a big fish check. Maybe it's luck, maybe it's coincidence. No matter what you will not get it out of my boat.