My main worry is how long it would continue to work with PD, because from some older forum posts I've looked at it seems that NewBlue have stopped updating the PD version, so it's basically 'abandonware'. Does anyone have any knowledge of how long we can expect it to keep working with PD, or is that anyone's guess?
(I am aware of the lack of an eye-dropper for the Chroma Ke, but apparently there are other free plugins that will provide that feature.)