Stumbled across this and it looks pretty good at a glance (for those of us who don't have a factory nav system and don't want to (or can't) do the expensive, labor intensive retrofit! I just traded in my 98 528i, which had the upgraded factory nav (6X9) screen and DVD map but that leaves me with a 2002 530i without nav.

At a glance this looks pretty good, I was curious if anyone has tried or have investigated this unit.