The spec of the Navigon 40 Premium is brilliant but I used one a couple of months ago and the routing was simply not fit for purpose. For example, driving up the motorway it took me off at a major junction, around the exit roundabout and back on to the motorway the other side. The latest maps were installed and there were no traffic problems. This was just one of many major errors from a single journey. The older Navigon 4310 was fine so looks like Navigon have done something catatrophic to their software. Is there a fix that can be downloaded? If there is I'll buy one.