Re: A very strange product
"However more seriously if they've gone to the bother of designing interfaces for various 35mm cameras, then (with all respect for LF users) why on earth not for the Medium Format users of 120-rollfilm cameras such as the Mamiya RZ-67 or the Mamiya 645 Pro?"
I don't know about those specific Mamiyas, but this will only work with cameras that already have the ability to store shooting data electronically. Back in the day, the camera manufacturers (and some third party companies) sold their own interfaces and software to retrieve it. This is just a modern alternative to the original cables and software, which today may be hard to find/expensive/tricky to get running on current OSs.