Worked a treat for me NinkyNonker I used the Mongan method with my own tweaks both times.
Very chilled out virtually pain free births both times (I have lost focus at transition and have had four really painful contractions for both births, but then gotten it back, weird).
DS2 was refusing to leave so he got the boot with a drip (what is that stuff? Synto?, can't remember) which made the contractions a bit stronger than they would have been naturally but I was still able to ride them out OK without needing any painkillers.
The main thing hypnobirthing does IMO is give you control. You become very aware and in tune with what is happening with your body so are able to make and voice your decisions a lot more firmly. DH is also very on board, it is his job to really question any medical types if they want to do anything, they have to have a VERY good reason.
Hands and knees for pushing is awesome, was much easier to push that way I found.
I like drugs a lot so am not adverse to them, I just like to be in control.
Nothing could touch me, not clothes not DH, no-one, it made me want to climb out of my skin.