I am using this watch from 2 weeks I founded a lot of cons in it there are so many reasons not to buy this one first of all it does not have heart rate sensor camera GPS or any other pictures like other watches . There are so many smart watches in market with same price but with some awesome feature.Smartwatch is without cellular connectivity and has large bezel in it .
Its new Crown button asap and terrible and it may break. Its price is also quite high compared to other smart watch with same features and one of the biggest con or bad featureis there is no SD card slot and has only of 4 GB internal storage and has only of 400 MH battery , you need to charge it daily if you are a Traveller there might be a problem to charge it.
So dont go for it.