Hi, @rezamusic, Nice Hunt
Here is my opinion about your product.

Pros:

• I really like this watch cause it has wide variety of cool functions.
• It has an amazing battery life which is great.
• The battery takes very less time to fully charge therefore it is a time save watch.
• Incredibly affordable.

Cons:

• Doesn't have a heart rate sensor but overall a very nice and useful watch.