I used the Alert system by Logitech. They are HD 720P cameras that do IP over power line. All you do is hook a command box to your home router and then plug these cameras into power outlets and they are set up. You do not need to run wires up your wall and through your attic. The system sends 16 FPS and is almost real motion in high def.
They also have microphones in each camera so you can listen to live or recorded audio. They have IR for night recording. I personally use the outside camera's inside as they are better at night.
I can view all of my cameras from my commander software on my computer, through any web browser and I have an app that lets me view them via my iPhone. They tend to be a bit better at night.
Another great feature is each camera has a 2 GB SD card in them so if your computer is off, they record to the camera directly and then download when your computer comes back on. The computer does not need to be on for you to watch live or the recorded video from the web or a phone app.
They are more pricey, but the ease of setup and features make them worth it. I have two teen age kids and I when I go out of town I can rest easy there are no parties at my house.
http://www.logitech.com/en-us/video-security-systems