: Also, like the MB NAV unit, it covers up part of the vents while in use. But to each his own and I'm sure there are many reasons people would like this NAV unit much better than the stock NAV unit.

: My only question is, your site says you never need to buy any more discs. If there are no need for further updated CDs, how do the maps get updated? Is there some wireless download technology? Streets and even highways around where I live change fast enough that the twice a year Navtech CD subscription updates are a must.

:
: : Here's a really superb story with photos on Alpine's state of the art installation in a 5-series, an M5 I believe.

: : Looks good, somewhat pricey, but much better that factory nav system.

: : Pat

I think that reference is to the fact that only one CD is required for the entire US, no additional CD's are necessary. That makes cross country travel much easier, since no dics loading is required. Update's for new roads would be handled just like they are now. The site owner's comments are particularly interesting about the speed of display refresh, which is much faster due to the DVD technology.

The old saying that covers this is never more true, "you pays yer nickel and takes yer choice."