I had gas and air which was brilliant. One time I forgot to blow it back out and threw up as a result, but the rest of the time, breathing fully in and out, it didn't make me nauseous at all (I still had pregnancy nausea during labour, but luckily labour is quite a good distraction from it!)
However, I was induced (waters broken then drip about 4 hours later), and I felt I would need more help to get to the end. I tried pethidine but I didn't like it. It just made me groggy and didn't help with the pain at all. So in the end I had an epidural which was great. Despite getting a dural puncture, which was not ideal, and it only working on one side to start with, I would still do it again. Even only working on one side I felt as if the pain was 90pc gone, and when they topped up they managed to get both sides which gave me a totally pain free couple of hours.
I also had a mobile epidural which was great, so I could still walk around. And right at the end they didn't top up, so I could feel my contractions well enough to push: but I just started on the gas and air again and that combined with the left over epidural was still pretty close to pain free.
The whole thing was physically harder but much less painful than I expected.
Top tip: gas and air makes you VERY dry, so get your birth partner to give you plenty of water or ice between contractions and make sure to take a lip salve with you!!