Positives
The iPhone 6 fills some gaps that I had with my 4s, namely almost doubled battery life, really nicer screen for navigation, performance, making it extremely fluid and an exemplary finish.
The Touch ID is really nice and allows secure access to the phone without having to enter a code every 2 minutes. Another positive point is the headphone jack, it has been moved down, this avoids having the headphone wires that pass the screen. Improved speed WiFi, network (4G), and improved sound quality are also present.
Negatives
If I had to absolutely find fault, it would be in the detail. Indeed, with one hand, when we want to reach the other end of the screen is quite tricky. Having passed a 4s at 6, I also accessories (Reveil Dock) he no longer had the right connections, I took an apple adapter for it and everything works fine.
I also cite the available space, 16GB is still a fair bit, especially when you love to take pictures.
Finally I will discuss the price that is high enough.
In summary, the product should please everyone, besides the anti-apple who seek the little beast.