Hi!
I've been using two of these Digitus USB extenders to run two FB3-driven projectors over about a year.
I learned with these extenders the connection is very sensitive for interference from fluorescent lights, strobo's and smokemachines.. connection gets lost and LivePro USB crashes.. not a good thing during a show.
I always use shielded (S/FTP) cables.
I don't know if the Belkins also suffer this problem..
I just bought this device, which lets you transport USB over IP. I guess identical to the device JeroenVDV is referring to. As ethernet is the basic protocol, this should be less sensitive for interference.
I've done some testing at home and it works great! No noticeable latency. I'm going to fieldtest it soon in an strobo and smokemachine populated place.. so i'm curious how it holds.