Off road I use the Motion-X app but for on-road turn by turn I am big fan of TomTom, had many devices right back to version 2.15 that ran on a Compaq iPac with a GPS sleeve (remember those?)
For the last few years I have been using the full app (not the noddy go app) in the iPad and it has been great, but they have just announced that they will no longer be supplying maps or services for it beyond September

So I might go back to the new 6200 and mount it in the top cubby with a mod to attach it to the base somehow.
I currently use the apple maps through carplay in the UK as the map data is supplied by TomTom but I like to have my maps offline for when the data signal is not available.