In reply to Brian's question about how difficult it is to set up the XX39A, I can only say that after many, many days and 3 calls to X-10 tech support my 4 XX39A cameras will still not work over the internet via the gipcam.com ddns. I have received incomplete and sometime contradictory advice.e This is one of the most difficult hardware and software setups I have ever seen, not tested, not clear, not well integrated, and thus not readily doable by most folks. I spent the last 15 years leading software development and this level of difficulty to acheive a successfull installation is unacceptable. If you are thinking about buying this product, I would first read these forum issues carefully. This is not plug and play.