The tr-1 is a great unit and i wish I had the cash for it, but its only good for trolling and not running on the main. I was hoping the new fishing features of the raymarine wireless would work on my st6001 but it will not. if yu get the s100 system them you will have the features of the tr-1 and the cruising of the raymarine system. the only advantage of the tr-1 is the speed control but they make a speed control called troll-masters. The thing that gets me about the tr-1 is the price. its what ? 3 grand. I paid only four grand for my whole raymarine system, gps, auto pilot, fishfinder,and chart plotter.