It works perfectly, the Bluetooth integration is effective and rapid association. The WiFi connection too. The dual SIM is well integrated, it can choose which SIM card you pass the call and can be stored a SIM card to dial each number or SMS sent, thus not having to choose every time.
GPS works very well, it quickly captures the position.
The keyboard is quite nice, except it offers and replaces words without being asked and I have not found how to disable or how to teach him new words.
A final downside, given its shape, you never know if we took it to the place or upside down, we must look if we have the small round of the top camera to check, but if not, in the taking in my pocket without looking, I often sought the power button while I hold it upside down.