Thinking of getting one of these for my '05 A3. What's peoples experiences of these? Will the Sat Nav feature work without issues? I tried searching but couldn't find any results specific to the Traffic Pro. I'm guessing Post Code entry will be fiddly with having to use the dials but it's not a big issue.

This is the exact unit i've been looking at:

BECKER TRAFFIC PRO BE7825 HIGH SPEED Nav/CD/Radio/Aux | eBay