Brand manufactures which gives their products assembled / made in China is different from a Chinese manufacturer. He does not have and does not so much investment in developing, is a plagiarist. Not developed service and often save their own parts, not configuration management, it is manufactured only "make it work." Maybe you will work well or not ... only time will tell ...
The topographic map I have no experience, sorry. I suppose, the principle is the same, work iGo navigation software with Navteq maps is the best solution, but perhaps in this Garmin is number one, produce a lot of tourist navigation (and probably should remain only in doing so).
PS: Garmin me angry for the differences, it is not democratic and very restrictive. EU / US models are much depleted than Asia.
Garmin devices have the major limitations in using any add-ons such as 3D terrain, viewing and sorting POI, assistance for drivers as are exits, junction view, line Assist, drivers alert, etc. is bound to the type of device.
In other producers navigation (iGO, Sygic ...) you have, or you can use always the same, many things and the difference is only in the license, but you can use all the device without any restrictions.
Garmin bought the company Navigon, so the situation can be improved. Btw the Navigon device is used iGO modified.![]()
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