I've installed systems like this before but I really liked how easy this one was to setup. It was virtually plug and play requiring very little configuration. There is also a free iOS and Android app available which can view all of the cameras at once. Adding your own SATA hard drive for DVR capability is also nice but not required to use.
Be warned that IR cameras cannot be run behind a window or glass since the IR light used to boost night vision will reflect off glass and blur the image.
After buying this from EPTCO and experiencing some problems finding a Hard Drive that would work with it, A 1 TB Seagate 7200rpm, seems to. I started looking for an owners manual. The one I found online says it's for this model but the GUI is in color and there are a couple of ports on the back as well as an on/off switch that are not on the model you receive.
I don't care all that much about an on/off switch since unplugging the power cord does the same thing but I would like to have the latest Graphical User Interface so that the owners manual matches and also it would have been nice to have the added ports on the rear panel. Namely the 2-extra audio inputs and the extra USB connection. see ZMODO's site for the latest with pictures.
Other then those issues, this DVR seems to work okay for my needs.
When you are looking for maximum protection for your home or business 24 hours a day, 7 days a week, look no further than this video surveillance system. It is a complete video security system in a box. This quality ZMODO product features an 8 channel DVR and 4 night vision weatherproof cameras. Simple to set up and even easier to use, you can monitor your business or home anytime from anywhere around the world so you will always know what is going on even when you are not there. Zmodo also offers lifetime technical support on this product so you are always covered.