Has anyone got one of these and used it? I got one but wasn't able to make it on the water this past weekend, but used it off a dock at a local lake- saw a lot of bluegill, crappie and a bass under it, which was a good sign. Neat little hand-held portable unit that may remove the "are they there?" part of the equation. It may just show me how many fish are snubbing my minnows and jigs though.