Got a Fishin' Buddy 1200(cheapest) and tried it out at Lopez on Saturday. It works great! Its nice to be able to see the features on the bottom. I have a U-shaped tube and need to work on the location of it. I had it toward the front of the tube but I think it may work better up toward the backrest. I'll try it again next weekend at Margarita and let you know how it goes as I get more use out of it.
Ken A