Igo Primo on both Iphone 6 plus and Samsung Galaxy Tab S.
Can't customize anything on the iPhone primo without running into license issues but the Android version version is so customizable that it's confusing and complex
Live traffic doesn't seem to be that accurate but then again it isn't with any navigation app I have experience with. It has one of the best lane assistance though.
Igo does the most important thing best; getting me were I need too be.