Marcosg,
I tried pm to you but the forum said your setting aren't enabled to receive pms.
The retrofit is dead easy, and yes I'm very happy with the quality of the OEM kit. I'm still waiting on Men, one of Patryks guys to contact me to code the car.
As far as purchasing goes please enable your setting so I can pm you.'There are some tips and trick here. I started with Patryk at
info@bimmer-tech.net Just be sure to include you last 7 numbers and letters of your vin.
You will also need to confirm if you have the USB in your center console and Professional Nav with the 10.2 inch screen. The upgrade wont work on the 7.2 inch screen running the business nav. The USB com box retrofit comes as part of the OEM camera kit so you canplug it into your center console if you need.
If you like I could Skype you through the fitting when the time comes.