The unit came with topo maps already loaded, like the NOAA charts. They also had most on the public numbers already loaded also. Garmin offers upgrades for the maps, but I think that is the LIDAR iinfo similar to C-MOR maps. As of now, Garmin does not accept any other maps, the simrad/lowrance can.
I thought i paid 599, but checking back it was 699. It was a Black Friday sale. I replaced a Furuno Bottom machine/gps combo.
I was very skeptical of the touchscreen, but so far, no complaints. I like the convenience of tapping on a waypoint and editing or deleting it instantly without having to go through a couple of screens
here's a shot of the maps that are standard
mounted on the dash
shot of sunken sailboat with the side scan