What should a good Navi can?
The receiver chip for the satellite must be sensitive, so in poor reception conditions still enough satellites are captured (weather, downtown area with narrow urban canyons ...) in order to steer with good accuracy (about 5 meters) can. In Graz I almost a little TomTom Navi thrown from the car rental out of the window, because it could not cope with the urban canyons and led me constantly back and forth.
Refix by satellite demolition (eg passing through tunnel)
The processor should quickly the necessary (dodge) to calculate routes and provide in good time before turning clear instructions.
Algorithm for intelligent navigation.
Traffic information should be included for congestion avoidance.
The display should be clearly visible even in bright.
The battery must keep at least 2 hours, if you need the Navi pedestrians in foreign cities. Thus one finds his car again. ;-)
Volume must agree even with stronger engine noise.
Operation should be intuitive.
Maps should be up to date.
Lane guidance is useful.
There are probably even more features, but I want to overdo it not even.
The maps could upgrade half a year free after purchase. As far as well, today there are "lifelong" updates. The screen is the correct size and is not half a tablet on the disk, which takes a drivers point of view.
The display is anti-glare and clearly visible even in the sun. A sensor automatically controls the brightness at night.
Satellite crashes had been noticed in the 4 years as well as not more than 80,000 kilometers navigated.
The battery lasts about 2 hours. In a small padded camera bag can carry the Navi well.
Alternative routes can be calculated quickly, the announcements concerning maneuvering be timely.
Jams are determined by a TMC receiver. The license fee you paid at purchase. However, TMC Pro covers only the most important routes such as highways and not always in real time. Congestion or road works and bottlenecks in cities are apparently not recognized. I was already a couple of times off weggelotst the unit of highways of traffic jams, but I suspect that each track was not practical. For example, if was close to the actual highway, the alternate road, I was able to realize unhindered traffic. Real-time capability for congestion avoidance is today - the end of 2014 - probably possible only with expensive Navis and not always that great, as evidenced by independent tests.
Intelligent routing - well. The device has a "right twist". If you move from south to north, for example in Germany, then you will hochgelotst in a small right turn. If you drive on the other hand back, then strikes again the right-hand twist and you go back another route. This has nothing to do in my experience with the time and possibly increased traffic congestion. Also you will sometimes suggested a longer stretch, which then reduced with consequent Ignore and use of brain power by half an hour. Why not so when the settings are set to "Fastest Route"?
If the map data is older than one year you could sometimes think it would be in software produced intentionally poorer routes to move to buy new cards.
There on the Navimarkt but eh only two providers and often lack some streets even after tens of years in the "new" maps, as I discovered with other Navis.
A lane assistant is absent in this model, so you have to look in some situations exactly on the screen (possibly zoom out), for example, to get the right track when multi-row motorway exits.
Who likes to play technically, finds hidden menus that display, for example, the positions of the satellites captured graphically or many other details.
Conclusion: All in all, a good model with potential for improvement which the traffic jam avoidance, routing, lane assistance, etc. concerns.
