Hi,
I thought I'd give a bit of feedback on these productis. In 2009 I purchased a single camera, it cost me around £160. Setting it up was relatively easy, although MS Windows security settings caused me some problems.
Recently (2011) I noted the price of these cameras had dropped considerably to £65 so I purchased a second unit from a different seller. This unit looks very similar to the first and again without any manufacturers details (Including name).
Once installed I found the picture quality of the two units were similar although the second one lacked green. That is to say all trees and grass was either white or grey. I returned the unit as faulty. At first I thought I was going to have problems with the seller (my parcel although tracked was lost in the post). But in the end the seller sent me a replacement as "a responsible seller".
When I set up the new camera the picture quality was the same as the one I'd sent back, no greens. I'm not sure what I am going to do about it yet. I am awaiting a response from the seller.