Points of interest:
The iPhone 6, and especially the iPhone 6Plus, can be charged with a higher charging current than the original power supply offers. The technological prerequisites for this Apple has already included, but still resolved, no matching chargers.
Use the car charger set of anchors, the maximum charging current is, however, fully exploited and my iPhone 6Plus is for good 2 hours from 0% to 90-100%!
The situation is similar with my Samsung Galaxy Note 3, which is also very loaded quickly.
When both devices are connected at the same time, the charging performance is still very good.
Conclusion: 5 stars for excellent value.