Has anyone tried SonarChart Shading to find ledges and reefs?

[LunaBuna]

Navionics announced recently a new feature that shades the water on the charts based on the depth so it's easier to identify bottom features, including reefs and ledges.
Here is the article about it: Satellite Overlay with SonarChart™ Shading
And the charts that include that are on sale this month too: Save $30 USD on Platinum+ and HotMaps Platinum in May
Has anyone tried this feature? What do you think of it?

 

[MaxBottomtime]

I've found many wrecks and reefs using Google Earth. You can zoom in underwater to get an idea of the shape of the reef or wreck including accurate GPS coordinates. It's also free.