Not to slam te vizualogic, but just as food for thought. I was installing the INvision system on a Saturday some months ago, and ran into a problem (not theirs, I did not read the diagram correctly). I called and left a message on Lawrence's cell phone, even though I did not expect to hear back until Monday. 10 minutes later he is calling me back and 10 minutes after that I am watching movies on the system. THAT IS SERVICE!!