Had a 999 SI Humminbird. Thought I didn’t like it so I sold it.
Got a Lowrance HDS 7 Gen 2 touch for the front of the boat.
And got a Lowrance HDS 7 Gen 3 Touch for the console.
I can honestly say I think I made a mistake selling my 999 Si Humminbird.
It had way more map detail showing he content of the bottom of lakes, ridges, Humps and all. And showed the depth details.
Showed the underwater bridges better also and the water depths around it.
And this is with a Navionics Platinum card in both units.