Don't have one but have fished with Rees guide and his a couple of times. At first I didn't like it but after a couple of hours sitting and staring at it I started to understand what I was seeing. Never touched the adjustments. It was good for spotting shad schools for cranking or spider rig fishing which we do mostly on our lakes. Can see where it would benefit someone who would dedicate the time to playing with it to get adjusted properly and the understanding of what you are seeing.
Can't remember his screen name but there was a guy on here from Georgia or Alabama that was always playing with the latest greatest electronics. He posted several pictures of screen shots he did on a 998 of brush piles and brem beds that were like the advertisement pictures. I think the secret is time and dedication to get it right.