As an alternative to motorcycle Navi

Have my case brought to it to be attached to my bike with Superbike handlebar (22mm).
It keeps very tight and extremely safe even at high speeds on the attached space.
For me an absolute alternative to the expensive Navi Becker, Garmin, etc. for more than 200th
Now it must also prove in the rain.
I hope that survive even after repeated use the plastic holders.

From me a strong buy recommendation for bikers need an expensive Navi and prefer to navigate with the Iphone.