I have owned a Garmin 72 for about 4 to 5 yrs, and I still stumble with it. I'm convinced that you have to take with you and use it all the time to remember the processes. I called garmin once and the guy on the phone told me that the unit wasn't very user friendly. Like I had to be told. Very accurate speed and setting waypoints isn't too hard to remember. Not many bells n whistles on mine, but I could always back track my trail. Power cord is about $16 and you need one and a dash holder for no matter which one you buy. Info cord for the computer would be neat to have so I could review on the PC. Got a lowrance sonar/gps this week and don't plan to sell the garmin.