What about those things..... anybody have much experience with 'em? My dad bought one about a year or so ago and never even took it outta the box yet. -It's one of those hundred dollar (or so) ones. Could I take this thing to the river and see flatheads under logs- or blues in lakes-stuff like that? I know that's suppose to be the idea but how well does it work I'm wondering? I almost know it'll do ok in a clear poolwater-clear lake but how about the average rivers and lakes' not-so clear waters?