Awesome info on the Garmins Right now I am in the process of switching from 2 humminbird onix units that have given me nothing but fits, lots of software issues. I see all this info on deep water. How does the 2D work in under 20 foot even as or shallow as 7 or 8 feet? I fish a lot of lakes in SD that barely touch that. Also how is the software on the Garmins any freeze ups, or other malfunctions?