Well, Apple Maps is better than Nokia Maps. It looks like the new Nokia Here App is worse than Apple Maps.
I use Apple Maps for navigation and a quick overview of traffic. Apple Maps is much faster than Google Maps and Nokia Maps because it does vector drawing instead of bitmap drawing. It also uses much less bandwidth.
To get detailed traffic information, I use Google Maps, even though it's slower.
I use a dedicated Garmin Nuvi to do actual navigation.
Google should have a new vector implementation of their Maps App by the end of the year. I imagine that it will also have turn-by-turn and ads. Nokia has stated that they are working on getting vector drawing; what they recently put out was just a first pass.
4 x IG Prestige MP, 70 cm, 376 grams, 386 SW, ALU Power @50