Wacom is too expensive, I pulled this Huion tablet. The reviews online are more appreciative, and I think it is deserved. The tablet is of good quality, the many shortcuts and practices. Nothing to say on that side. Drivers are not against by not on top. I could install without worry (those disk version 7 and those downloaded from the website version 9). Version 7 supports dual screen, but the operation of the stylus is not practical (click left mouse only), version 9 works perfectly but does not handle double screen. One must choose one or the other. I contacted Huion through the official website. They replied very quickly (within 24 hours) and offered me to try some manipulation to solve my dual problem. Without success. I will wait a future update the driver. In the meantime, I can still use it (windows 7), and frankly, for image editing is a joy.
Update 1 February 2015: Drivers take into account the 2 screens. The wait has not been long!