The Dakota is a good stout little unit. I have one ad really like it only complaint is that I wish it was a little bigger other than that it does great for what I need. Mine came with the 100k topo package which is good but I think I'm going to get a 24k package for a few specific spots. With the auto corrected GPS option on mine typically runs at 10ft accuracy and there is also a SD card slot so you can load data off a card like those my hunting maps or whatever they're called
Pm me if you have any specific questions