Just figure out which/any of the features actually matter to her. Voice commands for example may be neat for 5 minutes; but do you really need them? It's easy to keep 'one-upping' to the next model for more features but if they aren't features you'll really use/need.. who cares?
As others mentioned, there's the issue of updating the maps so find out how they offer updates, how frequent, cost, ease, etc.
As far as the interface, that's something that depends on the aptitude/taste of your mum.
no subject
As others mentioned, there's the issue of updating the maps so find out how they offer updates, how frequent, cost, ease, etc.
As far as the interface, that's something that depends on the aptitude/taste of your mum.