Free, and easy.
The only pitfall that my parents had (and a mate for that matter) was that in installing the camera there was another video chat applet that loaded. And if that was running it took control of the camera…
It's been a common thread when we've skyped that they've had sound but no picture. Trying to explain that they have another application using the camera is hard, normally they reboot and all is good.
So, advice would be to only install drivers for camera if at all possible, not the extra junk that comes with it…
Other than that, most excellent, and I'm using it in Kubuntu too, so good on Linux (and sends to PC)!