The IMiev we got was kind-of 'bespoke' - with full leather, reversing camera and upmarket DVD, stereo and integrated Sat Nav - we could even have had TV - at a price.
The Satnav is Garmin, but its is absolutely rubbish (IMHO)! There is no support at all for EV charge points, except for making favourites. However, its the route planning that is driving me crazy and I'm often taken on circuitous routes. We use Garmin for boat navigation and those models are great - but there are not cheap to buy, extend the map database, or to keep up to date!
If my routing is critical to range I always do parallel navigation on the IPad - but I only use Google Maps. We eschew the Apple Maps and its slick 3-D auto-pilot functionality, in favour of Google Maps - just tracking the car's movement on a 2-D map!
EV drivers desperately need some Satnav manufacture to come up with a EV-specific model, which could optimise routes for range (or speed). It should also have the ability to update the location of charge points, on a regular basis - adding in new charge-points (from the internet) within hours - not days! In the long term we could have a Sat Nav with telemetry that would give use real-time update on serviceability and availability; however, I suspect that is too Utopian to even contemplate.
Drive ON!