As far as trolling speeds, that model will not have a problem holding course at low speeds, it is designed to hold a course at low speeds, the only model with issues was the s1000, have not heard a single complaint about the X-5. Have not used an X-5 personally, I just put an S1G in my boat, for my use it is all I need, only using it for trolling stripers along drop offs or contour lines, or for running to and from the canyon, or maybe holding a course when there are multiple hook ups offshore. For the money the S1G is hard to beat. Does not have the troll patterns, but I'm not a fan of them personally, I would rather set a course myself to troll manually or use waypoints to follow a contour line or temp break, to me the extra money to go to the X-5 was not worth it(almost $1000 more) The X-5 is easier to install since it has less components, I believe they tried to use a virtual rudder feedback system instead of the sensor, I have mixed feelings about that, a sensor is best....but only when working and set up properly, so at times simpler is easier, plus less to go wrong as long as the software stays up to date and working.