I just had this installed a few weeks ago... it's still not locating me correctly. I've reset the 3D Calibration thing several times, tried changing the installation angle setting, and it's still showing me to the right of the actual street I'm on.

 

I usually have between 6 and 8 sats lit up, and my "connection" on the GPS is usually 1-2 bars.

 

This is a Pioneer Z2, and I have the newest firmware updates.