Just curious...I've never had any experience with an on-board unit. The SD upgrade makes sense for keeping up to date maps. However, I like to have the mapping software on my laptop so I can create my own route and avoid the point A to Point B guidance that most, if not all, GPS's provide. I've read many "A to B" complaints. Do the on-board units allow you to create or alter the route on the go (not while driving of course :}) or do you have to go with that flow?
Just curious, as we are seeing a GPS installed on many things these days...maybe someday even our lawnmowers will have one...JK. I expect to encounter an in dash unit one day and I'm always questing for knowledge.
Tom n Terri
Ty & Gavin (our rescued boys)
2008 Gulfstream Independence 8367, Triton V10-Ford F53 Chassis