I had only gas and air for my first two labours - the first wasn't too bad, but the second was induced and overwhelming with overlapping contractions. For my third labour I decided way before I wanted an epidural. When I went into labour properly I'd already had days of mild tightenings and little sleep, and was getting contractions in my pubic bone (didn't know baby had her arm by her head at the time, which may have contributed). I refused to go any further without an epidural when I got into delivery, and sucked on gas and air for the contractions while they put the needle in. I didn't even notice it to be honest, I was just so grateful to be getting it and knowing the pain would ease soon.
The relief when it fully kicked in was amazing, I felt so much calmer. It needed doubling in dose a while later when the contractions were at their worst, but the job it did was amazing. My second stage was a lot longer that time as baby came very very slowly - they didn't realise her arm was up until she arrived, but it was a good job she did as it meant I didn't even need stitches despite the way she was born. Crowning wasn't painful with the epidural and I got to feel baby's head - with my second labour they asked if I wanted to feel and I couldn't even bring myself to move as I was so desperate to get him out.
I definitely plan on another epidural this time, the birth was far more positive for me and less stressful. It was a little weird pushing without having a big urge too, but worth it to remove that pain. The epidural also wore off pretty quickly and I could move around.
I would definitely recommend one, but only you know what's right for you xxxxx