Except for the sensor (which is located after the filter so the number actually makes sense, but it's a bad location) the machine works very well, same as the xiaomi band (many review saying it had the best tracker, even compared to band 10x more expensive).
The smart lamp is also pretty cool (wakes me up in the morning, and sceduled to be on before I arrive home in the evening).
Can't blame the whole brand for 1 mistake in 1 product.