I had an induction 5 years ago. I didn’t have a choice of method - it was pessary. It does depend on circumstances though, a friend who was induced at the same hospital had the balloon because she’d had a previous C section.
I was sent home after the pessary was inserted, at mid day, and told to come back after 24 hours if nothing was happening. My contractions started 6 hours after the insertion, at 18.00, and I went back in when I started to struggle (at 4am, 16 hours after the insertion).
I had very very painful contractions and no break in the pain, as the baby was back to back. I was moved to the labour ward at around 13.00, 25 hours after the insertion. I was barely 1cm but they managed to break my waters and give me the epidural I had been asking for. There wasn’t an option to have it until I was on the labour ward.
The epidural was wonderful for me. I relaxed, and went from 1 cm to 10 cm in 4 hours. I was in so much pain beforehand, I wasn’t able to move around anyway - I just lay in a heap. The joys of back to back babies!
Bear in mind that more recent studies do not show a causal link between epidurals and instrumental or C section births. It is correlation, not causation, not helped by the fact that more complicated births (which are likely to end up instrumental or with an EMCS) are more painful and longer and so more likely to involve and epidural.