We bought this system when a power surge took out our 16 channel DVR. We've used it for over a year and I wanted to replace it within weeks of putting it in service but my wife protested spending more and she defended the app. The app works well but the DVR needs a hard reset(power removed)frequently to re-establish it's connection. When do you use the app? When you're AWAY from the DVR and can't unplug it. I am going to replace this junk and put it in a dumpster. Save your money!