I bought this device to replace a facial recognition door controller which had been gradually deteriorating after about 10 years of service.
The HIKVision replacement represents the huge amount of improvement in this area of technology over the past ten years. This new device provides essentially instantaneous recognition which is untroubled by glasses, beards viewing angle, facial expression etc.
It was easy to setup and it would be fair to say has well exceeded my expectations.
The only downside was having to wait a couple of months for delivery - nevertheless worth waiting for.