I purchased the subject unit about a month ago. It works fine if I use the webview or iVMS-4200 although with some recording issues that I have yet to figure out. If I use Blue Iris one or all of the cameras in the unit will periodically freeze for a few seconds, leave momentary video artefacts from things like passing cars or display a thin band of horizontal pixilation (but doesn't freeze or leave other artefacts). These problems seem to vary from camera to camera within the unit depending...
DS-2CD6D54FWD-IZHS Issues with Blue Iris
DS-2CD6D54FWD-IZHS Issues with Blue Iris