I’m an owner of multiple wifi cam bands like Ezviz, Reolink, Wyze, Tp Link and CP- Plus. I operate 20 Ezviz cameras in my account right now since 2018. While the Ezviz cameras are good, the live streaming and talkback services are way SLOW compared to others even in excellent Internet connectivity. 2 way communication works decently in Fluent mode but when the resolution is increased, the videos and voices start getting choppy and sometimes freezes. Retrieving past footage takes forever and I’ve seen a steady decline in speeds over last few years. I think their servers are overloaded or camera hardware is not able to handle the traffic. Ezviz cameras are little higher priced compared to few others so would expect a better or at least similar quality, but it lags in a lot of ways and needs improvement. Moreover the infrared light of night vision stops working for most cameras within 2 years , sometimes sooner. I’m slowly switching over to other cheaper brands with better performance.