I originally purchase two cameras. One for the front yard and one for the back. I was not entirely pleased with the performance, but they do work so I kept them. When I decided that I needed more cameras, I stayed with the brand rather than start over. I truly wish I had just started over. I have purchased cameras from Amazon and directly from Arlo. I now have 9 Arlo Pro 4, 1 Arlo Doorbell (hardwired), and one Arlo Essential. The video quality of these cameras is very poor. I did try a few of the Arlo Ultra cameras which require a hub, but the video quality was indistinguishable from the Arlo Pro 4. The hub requirement made the integration of the rest of the cameras and access more difficult so any minute improvement was lost in the added hassle. I returned the Ultras and hub. It is rare to get any good footage with clear facial features. It is nearly impossible to get legible information for things such as license plates or vehicle lettering unless it is very close to the camera. It is common for the cameras to miss motion events entirely. (Such as the time my car was sideswiped in front of my house. Not one frame of video was recorded of the event although there were videos of vehicles going past before and after.) Many times the recording will start due to a motion event, but even though there is still motion in the frame it will stop recording missing much of what happens. It is common for a person to walk into frame and have the camera start recording but then end the recording before that person actually does anything. In the screenshot of the video library within the Arlo software you can see that one of the videos was only 2 seconds long. The person came out of the door and triggered the camera but it then stopped recording so there is no footage of what that person did or where they went. Along with this, it is common for the camera to stop recording after its preset 15 seconds or so only to have a new motion event begin that is completely disregarded. Again referring to the library screenshot you can see that the person came out of the house but the camera only recorded 2 seconds. The next video is of that person coming into the garage. This video lasted 25 seconds but stopped while there was still motion in the garage and before the door opened or the car left. There is no video of the door opening or the car leaving the garage. The outside camera picked up the car backing out but only started recording after the door was fully open and it stopped with the car half out of the garage. There is no video of the car fully leaving the garage, leaving the alley, or the door closing. This does not happen every time but it happens often enough to be a significant issue. The audio is frequently unintelligible as well. Many times there is a kind of static sound that either distorts the audio or the static is all that you hear. This is not limited to one specific camera or one particular part of the property which seems to indicate it is a design defect rather than interference. It is also not constant with audio becoming clear or turning distorted even within the same video. The batteries in the cameras are decent however they do not function if the outside temperature reaches -5 to -10 degrees Fahrenheit. I was able to keep my cameras working by purchasing power/charging cables and plugging every camera into home power. Another thing to note is that it appears that aftermarket chargers will not work with Arlo cameras. I purchased from two different suppliers on Amazon and neither of them would work correctly with the cameras forcing me to purchase the very high priced factory cables. It seems to be common for the cameras to loose their connection and show offline. It is usually a simple restart of the camera that resolves the issue but what is missed during the offline time? No way to know. Over all having spent nearly $3000 on the security system of 11 cameras plus paying for the monthly subscription in order to be able to record and access the footage, I am very disappointed in the performance and quality of the Arlo system. I purchased a very inexpensive system many years ago that only had wired cameras recording to a HDD system with an awkward app and interface. The quality is not much different with this system. I have to believe there are much better systems out there and I encourage you to keep looking. I give the cameras 3 stars because they do work. They are accessible. The notifications are customizable (to an extent). They have so far lasted for close to 2 years with minimal breakdowns. The system is adequate but very overpriced.Update 09/20/2024Arlo made some change in their software causing the “Smart Notifications” to become inoperative on most if not all of the cameras. The cameras stopped recording any motion events at all when smart notifications were turned on. Turning off Smart Notifications allowed the cameras to record however now we have to silence all notifications since we get pinged for a leaf blowing across the yard. Even with this setting change the cameras are still missing 30% or more of the motion events with some cameras going days with no recordings even though people, animals, and vehicles are passing within view. I am sure Arlo will correct the problem (I sincerely hope anyway) and I will update my review when/if that happens.