I've used one. We're downconverting in live trucks to microwave back. The video looks better through the Matrox then it does when making a SD file from an HD timeline. It seems you have to "Refresh AV device" sometimes. We haven't used it to ingest yet but I did hook it up and that worked fine too, I just didn't do it in the field with an actual story. I wouldn't say there have been reliability issues but I haven't used it often enough to say one way or the other. I think it might require an Intel Mac.