I'm in America, where they don't offer gas & air (more's the pity, it sounds like fun). I decided to avoid the opiates as opiates tend to make me fuzzy and out of it, and I wanted to avoid an Epidural as I was afraid of the cascade of interventions, which is extremely common in American hospitals: namely that the epidural slows down labour, so you're put on pitocin to speed it up, which hurts more, so your epidural needs topping up, which slows down labour, so you need more pitocin, and so on until your body 'stalls' and you're told your labour has 'failed to progress' and suddenly you're being whisked off for a C section.
I had to go back to work 6 weeks after birth and so I REALLY wanted to avoid a C section and have a relatively swift recovery.
As it happened, I had to be induced due to low amniotic fluid, and got to 6cm using hypnobirthing techniques, but around then they were worried about my BP (after 15 hours in labour) and so gave me an epidural and told me to take a 3-4 hour nap, wake up, and push the baby out. That's exactly what I did. The epidural felt lovely (didn't feel it going into my spine) - warm and fuzzy and then numb, and I slept (while I slept they gave me more pitocin as the epidural had slowed down my labour) and then woke as I felt the epidural wear off. I could absolutely feel to push ( and it hurt, so I suspect the epidural had completely worn off) and pushing felt GOOD, though I think it would have been easier/ faster if I had been able to stand and squat - as a result of the epidural I only had back/side options, which was sad. DS was sleepy and I had a hard time latching him but I think that was a result of a long long labour rather than the epidural.
For me the real drawback of the epidural was not being able to move freely afterwards. I could feel my legs just fine but they wouldn't let me out of the bed, and so I had to buzz for ages for a bedpan, etc, and at one point thought "bugger it, I'll make a run for the loo if they don't come soon'' - but got then bollocked for sitting up with my feet on the floor and trying to stand!
Going in again soon - DS2 is due any day - and I will try again to get to at least 6-7cms without an epidural as they DO slow me down and pitocin makes things much more painful for me - but now I've had one I'm less anti-epidurals than I was before the first birth.
Ideally I'd like to do it drug-free so I can have a swifter and more straightforward recovery afterwards, be able to take a shower straightaway and not to be told I have to stay in bed for x more hours, etc. But who knows what this one will bring? each birth, like each baby, is different.