I bought this product when it launched in India. Using for almost 8 months now. So far ok with product.
Pros:
1. Good display
2. 5 days battery backup during normal usage
3. Good sleep tracking
4. Waterproof
5. High Oxygen Variation in blood can be tracked
6. Snore detect( beta)
7. Good design style and finish
8. Music storage
Cons:
1. Lack of in built GPS
2. Lack of some come feature compatibility with IOS
3. Poor Music controls
4. Lack of enough thrird party apps.
5. It’s more kind of a fitness tracker than smart watch
Conclusion:
If you have an Android phone would like to have a fitness tracker with some smart watch feature go for it. If you are hard core smart watch fan or have a iphone and have enough money to spend you can go for apple Watch.