Viewpoint precision, functionality and software, no problems, it's very good. The big +, the large number of switches and programmable buttons, or used directly. Although there are many plastics, it seems resistant is its "hit" is nice. Alas, big friction control problem on the throttle (fickle) on the stick which "grinds" (after ineffective lubrication, seems OK with melted candle ...), but especially the command "yaw" too "stiff" and "stuck" (obligation to modify the clamping of the stick regularly). At this price, these flaws are unacceptable. We can solve them temporarily, but they always come back (especially for yaw control) and it becomes annoying. To see in the time with a little wear ... Note: for inadvertent commands, do not connect it to the USB3, but only on USB2.