That all depends....
If you use a "hacked" system you can't use the maps with ALG ,IQ routes and so on.
Another problem might be the fact that you can't just add a favorite ,because you use a predefined mapsettings.cfg after installation.
Only option to add you extra favourites is to manually copy the changed mapsettings.cfg to a secure location and replace the old one with it.
Which device you buy does not really matter - you can even use the Tevion models from Aldi.
Some ppl like to spend a bit more money and use the 2DIN DVD player with GPS.
If you want to do more with it go for an older PDA with big memory and fast CPU.
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