Well I've been testing this card for some time now. I've been in touch with their engineers. In fact I had a conference call with their entire development staff including a gentleman names Jean Lapierre the head of development for Mac.
They were very gracious and kind and even offered to take a look at my original settings and create a custom setting that would kick out the same specs as what I was encoding with Compressor only. They guaranteed it would at least match the video quality of Compressor alone, naturally much faster though.
Man I really wanted this to work, but the results speak for themselves. I have yet to see a video encoded on the CompresseHD card that can match my Compressor only settings. Anyone else way in on this? I really want to be wrong, but no one can seem to match my quality. I'll even send you an uncompressed clip and my original settings if you want to have a go at it?
Here are my results: