I have been using it for several months, unfortunately I can't update my Chart Chip, because it is to large. (Central & South America). I have to contact Navionics
and have them send a new chip, which since I am in CentralAmerica if difficult.
With that said the idea of user input is great... The interface of making routes and waypoints is a bit clunky, but hey it is a start!
I encourage everyone to add infomration, since it only gets better with input!