Ive been using this since I received it five months ago. All I can say is that Im a satisfied customer.
Instead of writing a typical review about phone performance/battery/screen/camera etc., Ill just list the things that I love about this phone.
1) One is less number of third party apps that I have to use. Earlier I used different apps to lock apps, use flash as torch, block telemarketer calls, clean junk files etc. Now, I can do all this with built in apps or MIUI features.
2) Second is permission manager. This one is my favorite. I can deny permission to use camera, read contacts, read/send sms/mms, use GPS for the apps that I dont think need those permissions.
3) Denying apps to use mobile data is another feature that I absolutely love. I dont have to worry about incurring unnecessary data charges. Another plus is that it blocks annoying advertisements popping up on screen when using an app.
4) With the latest firmware update, I can now use whatsapp for both numbers. Its great.