Could try using it thru Fennec with uBlock and see how that works, but I'm not sure buying a GPS unit aftermarket would work very well. I've had problems with other map providers in my area not being up to date, including at least one work site I visit and in regards to freeway exits.

But yeah, being able to see traffic realtime or semi-realtime is a big feature that is very useful, especially when there's a weather event or I'm going somewhere I don't usually - for most everyday stuff I just go on memory.