Deeper portable fishfinder

[ice mac]

Have any of you tried the Deeper portable fish finder. It looks like a neat little unit. I am not sure I want my cell phone around water but it looks kind of neat.
Thanks

[3300]

looks great! battery not so much. nothing mentioned about interference rejection either. the app has purpose w/o the device they sell tho.
reading the bad reviews here

http://www.amazon.com/s/?ie=UTF8&keywords=deeper+fish+finder&tag=googhydr-20&index=aps&hvadid=35653184690&hvpos=1t3&hvexid=&hvnetw=s&hvrand=1147623029936468625&hvpone=&hvptwo=&hvqmt=b&hvdev=c&ref=pd_sl_1oazvd5cwy_b

internal links here
http://www.iceshanty.com/ice_fishing/index.php?topic=303440.0

http://www.iceshanty.com/ice_fishing/index.php?topic=311612.0