I have found two bugs on this version on MI5 3 GB
When I try to put shortcut for battery on display, this is open for a millisecond then it is closed. If I go in settings, the long way, all working.
The second bug is related to calendar, after I put birthday in contacts, calendar imported them like the person born in september is now on 9 of january, the other born in may, june, july, moved to 5,6,7,January, so somehow change the month with the day.
Except that, for one day, 24 hours, of working, loss 17 percent of battery, 1h.50min of screen, but I liked a lot how it is the line on battery graph in standby, almost horizontal, so its a good battery life, even from the first use.