Dont really know to much about them first hand. I do know they a rather expensive. They do have a high quality LCD screen. My buddies is powdercoated with a couple of small nicks/scratches in the case and are showing some small sign of corrosion on those spots. Other than that
It was a late 2004 Christmas present from himself. Its fix mounted on the open flybridge and definately exposed to the elements. He does have a cover for it when not in use. It doesnt seem to bother him that it is out in the weather, but if it were mine I would take a little better care of it. I have seen it drink saltwater on several occasions.