the system itself is very convenient, and works very well. nothing to say, it's great.
By cons, it is recommended on the site for nokia lumia 1520, and that's why I took it. or I find too small for this model: you have to put the phone in the right place (down the phone, where is the battery), and if we are not careful and given the size of the phone it not take the phone switches and no longer touch. So be careful in asking what makes the use a little less fast and convenient.
Conclusion: very good but take greater for lumia 1520