I just made a portable transducer mount for my Helix 10 SI for the bow. Only used it once, but it really helped me finding piles, fish on timber, etc. I can't say how much a pain it is taking up the transducer and putting it down when moving. My Helix are linked so I could switch to the transom transducer if I wanted. I had the Helix 10 transducer on the TM too, before I built the portable transducer mount.
Bottom line is I like it on the bow since I took it off the TM.