The cameras are clearly very good at doing what they are supposed to do. I am especially impressed by the night vision. When my security light comes on it is nearly as clear as daylight footage. The hard drive is a compact little unit that can easily be stored away. Setup is relatively easy, but the navigation menus on the unit are abit confusing, and the instructions could be clearer and a bit more focused on the main things to set up. The one let down is the feel of the plastic camera casings, and a cheap flimsy mouse. The last unit I had was not Sannce but another make and the cameras were very durable (made of a hard metal material). I am hoping these will stand the test of time (through times of severe frost and hot sun - year in and year out). So far, everything has worked and continues to work as it should do. My advice would be to pay a bit extra for another Sannce model where the cameras look and feel a bit more durable