Concerning autonomy, it is largely due the day with average use (1h GPS, 1 hour of video, some calls, 1/2 hour internet surfing -> the remaining 30% in the evening); pity that we can not display the percentage of battery (although you can do with a widget).
Regarding the dual SIM, be aware that only the first 4G and manages the data. Otherwise you can call with either the first or the second, same for SMS.
Compared to some comments, it should be noted that Android 5.0 can be set in French (choice at startup). On the other-hand, I did not see any audio problem: my correspondents hear me well and I hear well.
For the cases, there is still lack of choice, outside the universal covers.
