hI, I TESTED ONE FOR NORTH AMERICAN FISHING CLUB AS part of their field product testing member. So far I have tested 5 different items for them and I get to keep the products when I'm done. The Bobber with a Brain is a great little invention that can handle all your bobber needs all in one small package. It's very sensitive and will tip over whenever you get a bite. It holds the bait at whatever depth you set it at. it also comes apart so you can use parts of it for just a plain bobber if needed. I liked it a lot and use it for perch fishing when ever I have a taste for a fried perch. I did the product review in the monthly NAFC magazine and it 96 out of 100 points. Like I said, I thought very highly of it. I still use it today and recomend it anyone who still fishes.