...may I'm late in this discussion. My some discussed points are valid. But nothing is perfect, and with such a technical thing, you need to learn at least the basics!
In meantime I drove >200.000 Km with MyRouteApp and I'm still happy. More than with all other navigation tools I used before.
I also don't like to change your mind setting - but I personally would never use an extra device like AA or CP which are just "mirrors" of my main device - and are restricted and does still have early development issues. It's simply one more are which causes problems, I don't need. So, I use MRA Routeplanner and Navigation Next - that's it...