I didnt opt for the navigator due to the lack if localization of Porsche and the poor quality. I have to use the APP for navigation. This holder is working great for me until I get 6 plus.I like that.
I keep my cell phone in my pocket.
I use the Airframe which attaches to the vent. Use it in both my CGTS and LX. It's the perfect place for visibility, but it does block the vent. Not really a big deal with the vent partially blocked. I also like the Airframe as it's small and easily attaches/detaches so when I travel, I can use it in the rental car. It also rotates all the way around. The same one I used with my iPhone 5s fits the iPhone 6, but probably not the 6 plus, although they have a larger size version now.I just put mine on the seat next to me lol...
Though I wonder if the AC vent cell phone holders will work