I used this phone for 20 days.i found zuk z1 is good choice if ur budget is 12-13k. It’s back camera similar to all in outdoor lighting but it is much better except Moto G4 Plus indoor light. Zuk Z1 front camera is also good than the other phones in this range. This phone has more natural colors . Battery back is more than 36 hours more average user. Looks wise it really seems to be premium phone. Processor also good, never hanged. sound quality also nice. It’s have some heating issue but not a major problem. Zuk Z1 has lot of customization and you can upgrade Marshmallow 6 android.