I originally got another pet cam for the same price when I got a second dog to keep an eye on them, but the USB port to the old one broke and I didn't bother getting another one for a while until recently, when my neighbor complained that my dogs were barking (which they never do unless they see someone walking past outside or hear someone knock on the door). I was curious as to why they would start barking a lot all of a sudden, so I got this camera, which boasted easy set-up in the reviews, and a motion-detection feature. I've been using this camera for a little over a week now and I'm really happy with my purchase.Unlike the old camera I bought, the motion-detection feature actually does work (you have to turn it on in the settings of your camera first). I get notifications on my phone when motion is detected. You can adjust sensitivity to motion too, so it can either detect the smallest things (in my case, the water stream in my aquarium tank) to only bigger things like something actually moving across the field of vision. I am using this feature to detect when my dogs are barking, as their heads moving around sets off the motion detection feature. Also, if you do open up on a motion detection notification, it'll replay the 7-12 second timeframe in which motion was detected. You can store this in cloud storage, which you can purchase at an additional price, or you can have an SD/TF card on the camera itself. I don't personally need this feature, as mine is more a pet cam than a security cam.The lag is also pretty minimal. My old pet cam, there was up to 5 seconds of delay from when I pressed the pan/tilt button to when it would actually happen, but with this one, it's maybe half a second to a second.The sound is pretty decent, and I can hear everything from the water trickling in my aquarium tank to motorcycles outside my apartment. You can also hear the camera itself when it pans, and a subtle click when the camera automatically adjusts from night vision to day/normal mode. When I speak into the intercom, it's obviously not crystal clear as if i'm in the room with them, but it's pretty high quality and my words are very distinct. So, me saying "No barking!" works just fine over the intercom to get my dogs to be quiet. There isn't much feedback at all (unless, of course, you are speaking into your phone while in direct vicinity of the camera - then the camera picks up on the sound that itself is making, and it goes in a loop). Sound is constantly playing from the camera's end, but for you to speak out of the camera from wherever you are, you have to hold the “Speak” button.The night/day mode adjusts automatically, but you can also change the settings to have it be "Always Day" or "Always Night."There's a 30-day free trial for the "ring video cloud service" wherein a user can check doorbell ring call videos over a rolling 14-day period, for $20/year or $2/month. Not sure how to set this up, though. There's also 24-hour rolling 14-day cloud service (so not just limited to doorbell ringing recordings, but 24 hours a day, 14 days at a time), for $70/year or $7/month. And then there's motion video cloud service, wherein it only records instances where motion is detected, and it keeps motion-detected videos over a rolling 14-day period, for $2/month or $20/year. The Cloud Service plan is based on each device, not account; so if you got multiple cameras, you'd need to get multiple cloud service plans. You can have multiple cameras per account, so you could have one camera per room. I personally just have a 1-bedroom apartment, so the one camera suffices for me. It comes with mounting bits, so you can mount the camera high up on a wall or ceiling if you'd like.The app, netvue, is fairly intuitive. It guides you through set-up. I'd like to note that when I first set up my camera, I was supposed to hear a "chime" as a part of the first step when I plugged the camera in, and I heard some distinct blasts of noise, and I didn't know if those were supposed to be the "chimes" or not (they weren't). It took about 3 times plugging my camera in that I finally heard the sound I was supposed to (a more melodic 'chime,' as they say, rather than the high-pitched blasts of sound I heard the first few times I plugged it in), not sure why. It is indeed only compatible with 2.4 GHz wifi, not 5 G. But my old pet cam was 5 GHz capable, and it was worse quality than this one is on the 2.4 GHz. Make sure when you set up your camera (i.e. starting with plugging it in) that you have the app up and running first.