I've got mine working now (sort of) - the outputs were
labelled the wrong way round!

Trouble is, it's not working well at all for me, even
though my settings seem to be identical to Brian's. Basically,
when I send a command it gets repeated three times, so
moving the menu cursor up just one line is impossible.
I need to check with the supplier.

I think mine was something like £80, but it's a dual
output one with pass-through.