I have the HB 798ci HD & I upgraded the transducers w/the HD one. I've had it sense February. I actually, think I have around 1100 hrs on it. It's ok, there are alot of videos on u-tube about how to adjust it, that helped alot. There are alot of different adjustments & bell & wistles. The side scan & down imaging are cool. You can see some really crazy stuff laying on the bottom. but it actually has to be adjusted correctly for every depth for optimal performance. I still have alot of learning to do w/it yet. I am not impressed w/the GPS. It takes about 15 min to hook up when you turn it on. For it to work correctly , you have to be moving about 3 mph for it to be accurate. I don't move that fast w/ my troller. Most of the time you just see the "donut" which may or may not be in the right place. My hand held garmin E-trex legend is alot more accurate.
Don't lie, There's less you have to remember