My Toppy (as they're affectionally called) worked perfectly. It recorded Lost for me, so I watched it when I got home. And then I realised there was a +1 channel showing the next episode, so I watched a bit of that. Which was possibly a mistake given how late it was.
Now I need to get the right USB cable (it's got a different standard connecter at one end) and then I can start upgrading it and adding on extra functionality.