Having just done another floor with a score and snap cutter, I feel
obliged
to sing the praises of this method for straight cuts. The Rubi uses a
forward stroke and snaps from the far end of the score, which gives you a
time of around 10 seconds per tile

I'd certainly agree, assuming you have ceramic tiles capable of being
snapped. It's a bit more difficult for diagonal cuts, as the snapping part
won't work and the tool may not be long enough. And I wouldn't even attempt
it with riven slate!

Christian.