I purchased this band in Aug 2018 through a sale, been using it daily since then....
Firstly it is a durable and good quality product, out of the box comes the device and the band along with the charging piece. You need to connect it to a USB enabled charger head ( your phone charger head can work) to charge it. Full Charging stays steady for a week despite continuous usage.
It is a comfortable device and it does not feel like you are carrying it on your hand. Lightweight , it has a sensor that shows the time when you lift your hand at a right angle to look at it ( how you look at a worn watch). It is water resistant, as in you can wash your hands and even bathe wearing it. It integrates with the Mi fit app and you can customize controls through the app. It can even show who is calling on your phone, though you cannot receive / disconnect the call.
On the negative side, it does not have a heartbeat sensor which would have made it the best wristband device...
The strap is good colourwise but thats about it. Its lock isnt as sturdy as the original one but does the job. When worn the finishing does affect the wearability as initially there were a few mould cuts that needed to be chopped off. The main MI unit fits properly and doesnt shuffle so thats a major plus. Lets see how it lasts.
Definitely not close to the quality of the original belt. I had to order this as my original one loosened to an extent where the device was slipping and falling down. This belt looks good, but not up to the original quality.
Found it a bit stiff one initially compared to original one but it fits better and seems more durable than original one. Got used to in couple of day and since wearing the same 24 hrs. No issues faced. Value for money can go for it.