I only had this unit for about two months now. While the beep and speaker volume are ok, the internal video camera resolution could use some improvement. I like the chimes when there is a door or window open but I wish the control panel had the voice option to let me know which door or window is opened or closed. I give it a three stars because I don't know how fast and efficient the system is in case of a break-in. Hopefully that will never happen.