There's several solutions to transducer mounting but none are as easy & portable as using a Ram transducer arm. Using the Ram arm allows you to easily transfer our fish finder from yak to yak. While it does what it's advertised to do I'm giving it only 4 stars for several reasons. (1) price, $45 seems a little steep. I only spent $65 on the fish finder. I have nearly that into the mounting accessories. (2) Drag. Yup, any Ram arm off the side is going to give you some drag. When I want to make time I pull the arm up when paddling (which could be seen as a plus, I guess). (3) The impression I got before purchasing it was it was articulating. Well, not really. It's a bendable aluminum rod with a plastic sheath over it. The kind of deal where you bend it once and leave it. It is what it is and works well. Just don't have the impression you can easily change the articulation each time you use it.
Overall a 'must have' accessory for me.