The genial intuitive interface is unique. Even people with no prior technical knowledge will be able to quickly use the most important functions. Many additional technical features of other devices (MP3 players, announcement of street names, Voice control, ...) are not integrated into the TomTom ONE, but did not miss. The map material is indeed confined to Western Europe, but is - at least for me - not a problem, because I am staying anyway to 99% there. A software update may regularly carried out and are delivered free to purchase once the map up to date, so that the device can fulfill its function as a navigator fully. This is enhanced by the now integrated TMC. The route calculation is fast and reliable, an alternative route can be easily created. If he deviates from the planned route from that is no problem for the TomTom One. Other functions (Map Share, radar detector (Caution: use in Germany illegally)) are present. It is small and light and can be transported in a pocket so easily.
The problem is the battery, with its meager capacity. 1.5 hours runtime are very little if you want to use it on foot or on a bike ride in the car, this is thanks to 12V connector no problem. That there is no way to plug-in memory cards is to get over once - as I said, the TomTom ONE does the job. How it but in the future looks with growing volumes of data, you can not say. Currently the store is almost completed.
Conclusion: ideal for motorists with west facing routes