I've had the opportunity to use both the wired transducer attached via suction cup and the wireless remote sonar sensor. First I'd like to make it clear that the RF45 RSS is included. Some of the product information I read seemed to indicate that it was not included, but that was wrong.
I bought this because several times a year I go to a local lake and rent a boat to fish for trout and Kokanee salmon, the rest of the time I spend fishing I fish from the shore. During a recent trip when I rented a boat I used the wired transducer. The boat I was on was a large pontoon boat and the only place to attach the transducer was to the back of one of the pontoons. The surface was rounded and had algae all over it. I got the transducer on but after a short time with the 50hp motor at full power the transducer fell off. That was okay, I wasn't expecting it to hold on at higher speeds, especially with the poor surface it was attached to. Once we got in the area where we wanted to fish and started going trolling speeds the transducer held on very well, it might have fallen off once every few hours. I do expect that if the surface had been flat and not covered in algae it would have held on even better. We trolled in water from about 30' deep to 110' deep and in every case the fish finder did well, even auto adjusting the focus on the display as we went from 30'->60'->90'. I learned a lot about this lake using the finder that I would have never known no matter how many times I've fished it without one.
The wireless sonar sensor was a little tricky for me because it seemed that it was not being detected and the display would go to a simulation without displaying that fact on the screen, making me think the simulation was what I was seeing in the water I was on. After I figured out how to keep the unit from going to simulation mode it worked well. I haven't marked a fish with it yet, but I do now know the depth and what the lake bed looks like in my favorite shore fishing locations.
After several uses including an all day boat outing I'm still on the first set of batteries.
I like this unit and would recommend it to other fisherman like myself who fish from shore and sometimes a rented boat.