A USB hub, where?
If we just judge the holding of the screens, no notable concerns. The arm strength refinement is, shall we say, fine. On the other hand, to say that the stand has a usb HUB is a lie. You have 2 USB3 ports on the stand, connected to 2 USB3 cables, to be connected to 2 USB3 ports on your machine. It is absolutely not a HUB.