Well, it's arrived and installed OK, but it's not 100%.
The software is not as good as the excellent DScaler that I use for my old PCI TV card (it doesn't suspend the screen power saver or kill the pointer) but the big problem so far is that although it scanned in all the BBC channels I expected, it won't display them! In fact the program closes if I select any BBC.
I seem to dimly recall that the BBC and the commercial channels transmit digital in different forms, but I can't recall the details. Does this sound like it could be the problem?