This kit gives you some good options for those wanting a starter security system: Comes with, or without a hard drive... 4 Wide angle cameras (allowing you to upgrade to PTZ, normal 6mm, or just more wide angle's). The cameras that come with the system are, well, just OK. Because they are wide view, they are trying to pack a wide area view into a low resolution sensor... therefore the video is pixelated and fuzzy. Color rendition is better than acceptable in daylight. With the additional 4 outlets available, I'd consider a couple 6mm or higher quality (hence more expensive) cameras. Combine these with a Zmodo PTZ dome (with or without the "Z"- zoom feature), and several normal-angle cameras, you'd have a fairly sophisticated DIY surveillance system.
About the Zmodo quality... I purchased a 4-camera system from Woot a year and a half ago and it went out after 13 months. I contacted Zmodo and they said to RMA return it and they would (still) cover it under warranty. They did, however, attempt to later disqualify it, but I buttered up my contact and treated him as my "agent" and not as the opposition and they sent me a new box and remote. They were very responsive, helpful and easy to work with.
The cameras do have IR night vision, but it's only good over about 25' effective distances with a view of an area with "reflective" qualities (doors, walls, ceiling, deck, sidewalk, etc.) If you try to use them to view your open yard, the only thing you will see will be a blob of light since the IR LED's are concentrated on a spot and are not dispersed over the camera's full width. I've found others that have better IR dispersion on Amazon. You will probably be able to recognize people you already know with these but using them to identity pilferers out 20' or more will be next to impossible (due to the wide angle, 3.6mm lens). Wide angle is great for surveillance, but not identification and details.
You can use these with Cat5 wiring if you purchase balun to Cat5 connectors. I've done this on one camera and I can't discern a difference. One other thing... before you install any camera outside in the elements, tighten the lens ring by hand. They are notoriously loose from the factory. If using them from the inside to view the outside through a window at night, unhook the IR ring from power by removing the lens ring and unscrewing the 2 small screws and detaching the 2-wire connector. As an FYI, Woot had a First Alert 8-camera system at the beginning of the year I picked up. I now use this as my primary surveillance system. I'm planning on using my old Zmodo- 4-cam as a hidden, redundant, system monitoring my First Alert 8 camera box, and other inside strategic access points--- which will capture anyone attempting to disable, or remove it once I get a hard drive configured for it.
A fair deal at a buck-thirty if you have a spare HD lying around... gives you something to work with right out of the box, yet upgradable and expandable.