Our trainers do use them, as they are way better than the built in laptop speaker/camera/mics. You plug all the associated pieces into a hub, give the hub power and connect it to your laptop. It is seen as 3 discrete devices, so you have to remember to select those rather than the built in ones.
Without a laptop it doesn't do anything at all.
That's why we dumped the idea of the CC3000e as a go-forward project. The fact that we would have had to basically tether a PC to it (or go through the nightmare of hoping people could adapt it to their own) kind of killed it before it started.
Our company (800+ staff) is actually very happy with our implementation of the CC3000e in a few meeting rooms!! we have set the rooms up so that a person brings their own laptop and can quickly connect 1 single usb port, 1 vga cable and 1 network cable to it and they are set for any type of web-based conferencing... Skype, bluejeans, gotomeeting, lync etc.... we currently have 4 meeting rooms setup like that (with clearly written instructions on a wall) and the users love it as it gives them independency from the iT unit.
We also have a few rooms with professional grade room systems (polycom hdx7000 and group500) and these often require full IT support.
The CC3000e is a brilliant equipment from Logitech that easily combines an HD webcam and a great speakerphone into 1 single USB connection for the laptop