I would have give it 3.5 star but it be not a option . I only give it 3.5 star because of the poor software and useless base map . the unit itself be a nice unit . I have have the 60csx for about a few week now . there be a learning curve at first but now I have it setup to my preference it be a pretty nice unit . it take a week to get use to how the unit function . after that it be pretty simple to use and navigate through the gp function . I be look for a unit that have mobile capability like my eTrex Legend and yet want something that have the detail map and navigational capability like my Garmin 2720 . I purchase the 60csx as a well rounded solution for my need . so , far it fit perfectly with some additional cost of course . pro : handy unit , it can be remove from the car and carry unlike the 2720 . screen be large enough to read . well lay out button . rugged . good screen resolution . con : Software that come with the 60csx be pretty much useless . need to buy the extra memory card and additional software for better map , I purchase and extra 1gb memory chip -lrb- $ $ $ $ -rrb- . the 1gb chip be a over kill but I like the flexibility . without the extra item the 60csx be no better than a eTrex Legend . fortunately , I also have a Garmin 2720 with the North America NT v7 software w \/ full unlock code . if you register on-line with Garmin you can reuse the code to unlock another GPS unit -lrb- 2 unit max -rrb- - you need this to download sectional map to the 60csx . if I do not have the other unit unlock code and software I would have spend another ~ $ 150 for additional software . to figure out how to get the unlock code to work and download better map to the on the 60CSX take another 1.5 week . not a intuitive process . email tech support several time , it be much faster than call they and wait on the phone . email response be less than 2 day . Update : the 60csx work with the Garmin 2720 external antenna . sat lock on much faster ... even thou the 60csx do lock on pretty quick already . order the window suction mount , wait for it now .