I've just had my 335i X for a day and a half and I too have the testmap version loaded into the GPS. So far it has worked well and even some of the really small roads seem to be in the database. I'd like the Road Map Pro version however if the current version has no problems it may be hard to sell the dealer on the idea of updating it.
Is there any way to get the traffic information while here in Germany? Hard to believe my $350 Navigon had features that the $2100 navigation package does not (speed assist and warning, traffic and detour updates, police cameras, etc.). The dealer said the traffic info only works in the US that comes with the US spec BMWs