I read negative review on anything first and foremost before buy anything . I order this and it be day one but it be work fine . my suggestion to people who say it do not work . a cd come with it , install it , follow the instruction and you will be fine . also make sure that you video card be not a cheap po because although it be a usb hook up the driver communicate the information from the UBS port to the Video card . so I get news for you if its not work you card probably do not have enough memory to support it . I have two monitor hook up with different resolution on each one and they be work well . also do not plug into a usb hub and expect it to work . my hub do not work for anything except keyboard and mouse hook up . I suggest this because if you follow the instruction then there should not be a issue .