I used the phone.its very good and offers wide range of customisation based on the oxygen os.The device doesnt lag at all.
Its feels good in the hand.sound quality is reallu awsm.i loved it.Rear camera is very aswm including the front, you will love it but the focus could have been more precised.
Altough its 64gb but a sd card slot would have been better since its able to capture 4k videos but at the same type it has otg support, so its good.Slow motion video you will love it.if I have to sum you must go for it as it has all the features.