Can I ask why you decided on Garmin as opposed to simrad lowrance or other brand. I still didn't get my upgrade and I am always looking for real world reviews and opinions.
I looked at the tutorial online and it does look great.
As a rule I’d agree with that last partI'll chime in, although I'm certainly no expert. My current boat was bought used and had a Garmin 4212 combo GPS/Sounder/Radar unit in it, much to my delight.
The new Garmin g3 BlueCharts do rock. Regrettably I have an "older", 7 year old machine so I'm limited to g2 versions, which are still nice and more recent than the NOAA ones. For example, while the standard NOAA chart only shows 2 docks in my neighborhood, the new g2 has every one, including mine, that has been built up to 2016. They also do a satellite photo overlay on land which is cool.
Since I'm far from a radar expert I won't comment other than it's nice to have it overlay the chart so radar integrated with your GPS has become a "Must Have" IMO if you spend most of your time inshore and want radar.
My sounder has a basic 250 KHz transducer which is more than adequate for my needs. AAMOF when fishing in the estuaries, I unplug the transducer if I need to use the GPS and/or radar while fishing in the river. I've had instances where sounder use has spooked the fish and since the 4214 is an integrated unit, if the GPS is on, the transducer is running. If I ever have the need for side-scanning, and/or CHIRP I'd go with a separate unit.
One final comment is my hatred of touch screens. None of my computers have them and fortunately neither does my Garmin. I can't even begin to imagine what a nightmare that would be with me and my fat, fish and bait dripping fingers. I make enough of a mess with fish guts on the Garmin's keys. I firmly believe that touchscreen electronics do not belong in the cockpit of a serious fishing boat, just not practical. They're probably fine on a boat that's primary purpose is NOT for fishing, and that is a very foreign concept for me...