Summary: This is the SECOND one of these I have purchased. They work so nicely, and contrary to what some say here, I've had it working on Windows Vista AND Windows 7 - haven't tried it on Windows 8 though. Would recommend to anyone.
Summary: I got this as a cheap route to dual monitors and it works great for me. In fact I have two of them. I supposed if you have intense needs like games, it might be a problem, but I have never seen any latency myself. It did break with Windows 8.1 but I got a newer driver and it's fine again. Overall this is an inexpensive way make use of an old monitor you have sitting in your basement to get dual monitors.
Summary: The wife needed a 2nd screen at work. Their IT dept. did not know how to make it happen. She brought her work PC home to me in order to put a 2nd video card in it, and to configure for a second screen. Unfortunately, unbeknownst to myself... she brought home a SFF (Small Form Factor) PC, for which none of my video cards would fit. Found this Eclipse external USB device while looking for a SFF compatible video card at Best Buy.