I would also give OpenStreeMaps
Great for real maps, but for nav, directions, crowd-sourced traffic speeds & real time re-routing, you can't beat
Waze, free except for the fairly minimal amount of data used (19.21Mb over 30 days, and starting outside the house probably using wifi anyway), and
Google Maps is also very good and now caches maps & routes offline. Have been perplexed (and ignored it) when it wanted me to leave the motorway only to join the back of a 1 hour standstill; the more recent versions at least give you a clue why.
I use sygic on my Smart phone and I find it great no need for an internet connection
For France I used and recommend the 14 day free trial of Sygic so no data used at all, but it does not benefit from the dynamic data of other map users.
The premium for Navi editions, makes me believe only ex-demo cars will have it, even £60 for a TomTom seems steep compared to smart phones considering they are likely to be with you, playing podcasts or BBC catch-up over the bluetooth, and acting as a phone.
Jump in a six year old Jag with DVD maps and it seems antique.
Incidentally, Waze GPS 70mph = 74mph on the clock.
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TG