I've had two fast labours, the first one induced due to GBS, bubs was born 3hrs after induction and DDs labour was 1hr25 mins (SROM with contractions starting minutes after my waters broke). Both were very intense and the pain went from nothing to everything very quickly but I'd do the same again as it was over quick and the recovery time was almost instant so there are massive advantages to consider too. I had no time for pain relief either time, but that also contributed to the quick recovery.