Great unit been running one for two years . Fish finder works well and the draw speed on the gps is exceptional. The Garmin G2 card is great for lake Ontario and Erie. Navionics is working on a card I have a 901 Great Lakes East that they gave out for feedback and it can be updated with data from your sounder . There are some good half price deals out there as the unit is being changed from the touch screen to a button model. the stock transducer is good but you can update to the Airmar P66 which is better and get surface speed as a bonus . I have 5 Garmin units and they have been trouble free the last 5 years . This has been my experience and only my opinion some may differ.