I had read mixed reviews on these cameras. I decided to purchase 4 of them anyhow. I was very pleased with the ease of installation. Everything seems to work great. I am pleased with the cameras. It does take about 5 -10 seconds to connect to a specific camera for live view in the ring app. I have the very latest as far as my mobile devices being used to access the app and cameras. I have a very efficient, current router as well. No matter what I do, there is quite the delay in connecting to Live view. (If I dont have to keep restarting the app because it froze up in attempting to activate live view). 
There is also a ghosting effect that appears when someone walks accross the monitored area. That effect is decreased to almost none at all, if I take my mobile device off of the same wifi and use 5g. 
Overall, I am satisfied with my purchase of the cameras.