Anyone ever try these?

http://www.humminbird.com/productLines_wide.asp?id=610#sc15

They sound interesting since i am mostly a shore fisherman. But i am skeptical. I can see myself smashing it against a rock or throwing it in a tree. But if it actualy works well, it may be a handy little device. Its from humminbird so they know something about fishfinders.

What do you guys think? Anyone give these a test?

thanks,

Mike

I have the RF-35 and it's not bad for shore fishing. It gives you all the basics.

Anyone else use it?

I guess I have lived to see it all.

MINE WORKED GREAT I TOOK THE WRIST THINGY OFF ON THE SHORE AND THREW IT IN THE WATER IT TOOK 6 SECONDS TO HIT BOTTOM THERFORE THE POND WAS 5 FEET DEEP IN THAT SPOT