Bought this to replace an HP workstation / Nvidia FX1700 card / HP dual monitor setup with a Toshiba laptop. The Nvidia card was excellent, but cost over £350 on its own, giving me 2 screens, and few complaints.
The product installed rapidly, but I needed to download latest drivers to make it work properly. These were easy to find etc. Desktop setup was initially slightly tricky to understand, but after 15 minutes, it made easy sense and everything worked fine.
I was nervous, having bought a very poor external USB external monitor product before,but once this was running I was amazed at the speed and quality, on all three screens. It runs my HP monitors at their native resolution, and my laptop screen on it's different native resolution with no problem.
I don't use HD video playback, so have no idea if it is any good, the video lead supplied is pretty short and stiff, but other than this, as a low cost way of supporting three monitors, at superb quality, this is excellent.
BTW, it is easy to change desktop setup, and applications can be set to maximise and open in whichever screen you want, as well as dialogue boxes and tooltips etc. so apps don't have to stretch over 2 screens. Some stuff like windows start screens still sit in the middle, despite settings, but most of the time, you won't notice you are using it!!