Ken,
Have you found a better one? I haven't bought it yet but haven't seen many options.
Tim
Tim,
I sure wish I could say I had a good answer or a good alternative. When it worked, it was fantastic. It did exactly what I wanted it to do. I found sunken structure. I found out where the fish were hanging out. I was able to roughly map two ponds.
As I mentioned above, do a Google search, and read the reviews at places like Amazon, Cabelas, etc. Unfortunately, I did a quick search before posting this, and it looks like lot of people still unfortunately have had the same experience as me.
Maybe you can find somebody with a fishing boat, and who has one of the good portable fish finders. Launch the boat, or a canoe in the pond, and give it a try.
Ken