My 2007 328I had a dvd based factory nav system. It was flawless without any map updates. My 2011 factory nav system uses a hard drive nav system with a different map source (tele-atlas). It will not even direct me out of my 10 year old community (takes me to a closed construction entrance). BMW NA says it is not "their" fault but to report it to Tele-Atlas. It has on numerous occassions mis routed me. BMW wants $399 to update the maps, but with no assurance they are any better. What a ripoff of a major car company. I hope all of you who have 2010/2011 factory nav systems with bad data to pursue contacting BMW NA and complain. We may need a class action lawsuit to make them fix a problem they have selling us a $2100 nav system that is so flawed. I recently used my free app on my smartphone, and it gave directions 100% accurate for free. What a waste of money I incurred buying the factory nav system.