The usual options are available when finding your destination. You can search for a full seven-digit UK postcode or drill down from city to street and house number. But you can't search for a keyword across an entire country. You can look for a keyword with the POI database, either nearby, within a specific city or across an entire country - handy if you didn't know the Admiral Blake Museum is in Bridgwater. But if you just want to browse a category, that's available too.
When you search for a destination, for most journeys you will be presented with three routing options. These will be calculated using average traffic speeds for the time of day and day of week via Navigon's MyRoutes system, with current traffic jams taken into consideration. The quickest option is indicated as MyRoute, but you can choose an alternative that uses roads you prefer driving. As hinted before, you can also create routes with multiple waypoints.
The general map display is essentially the same as previous Navigon sat-navs. The map is clear and the route obviously indicated in orange. The next two turnings are shown on the left, with your current and next turning road names in the middle, and information about the distance to destination and estimated time of arrival on the right. This isn't quite as much as TomTom provides, but still a useful level of journey data.
At under £200 for a sat-nav with maps of Western Europe and some Eastern European countries, plus traffic updates, the Navigon 40 Premium is good value. It's not such great value that it entirely distinguishes itself from the Garmin, Mio and TomTom competition, however. So this is a capable sat-nav with all the key features for daily navigation, but it doesn't stand apart from the crowd.