First of all, it is a very beautiful, sturdy watch that is a clone of the apple watch.
Very good connectivity and flawless bluetooth calling. Sports, heart rate, oxygen, GPS, NFC, phonebook, weather, music, etc. It has everything that smartwatches generally have in this category.
As for its battery, I would say it is decent because with normal use it lasts 6-7 days, although if you constantly have bluetooth calling enabled, it barely lasts 2 days. Its screen is quite good but it does not come close to AMOLED in any case.
Its biggest drawback is that while it can have 8 watch faces and its app has many, it only allows you to change one and keeps the other 7 of the watch fixed.
Overall, it is a good purchase and you can easily find straps, protections, etc. because they are the same as the ones for the apple watch.