I have the 1101 fixed mount fish finder on my 10' plastic Bass Raider I use for small lakes/ponds.
It's the same finder as the 1101 Fishin' Buddy only not in a one piece unit.
It's a decent finder for the money imho.
I took it out and tested it the first day I got it. I used a tape measure, and found that it was within a foot or so in dept read outs up to about 24'.
The temp is darn close too!
As for fish read outs, its ok. In shallow water you do need to be right over the fish for a display, but it helps me find schools of suspended fish and it was worth every penny for what I use it for. I wasnt putting a $300 finder on a $600 boat. :D