I have had the absolute worst luck with these cameras. I have 7 of them, and 3 have failed and been replaced by DLink. And now I have two more that have failed. The whole system is only 6 months old.
The problem is always the same. The cameras freezes up and when you log into the admin page its showing a freeze frame from days ago. You reboot the camera and you get one frame and it freezes again.