Navigation systems

What is the best motorcycle navigation system?
New navigation systems appear on the market almost daily, and the choice doesn't get any easier. There are now also several alternatives for use on the motorcycle. How do I determine which device is most suitable for me? Let's first compare the different devices. If we are to believe the marketers of TomTom and Garmin, the choice of 'which GPS on the motorcycle' has become very easy. If you go for TomTom, you choose the 'Urban Rider (Pro) (Pro Plus)', if you go for Garmin, then you choose the Zumo. After all, these devices are presented as 'specially made for the motorcyclist'. If you go for simple and easy, then choose the cheaper interphone navigation systems.