I've had early inductions with both my babies at 37 weeks due to pre-eclampsia. Cervix was as firmly closed, long and posterior as can be prior to the start of each. Babies were high and unengaged.
I had gels with both. First time because it was what was used in my trust, second because baby was high, so a balloon was a bad idea. As with PP, the gels only seemed to open my cervix the bare minimum to get the waters broken. This is where the waiting came in for me. Once you're 2cm, waters intact, and not in labour, there's not much/anything they can/will do until there's space on delivery suite. And that, IME, is what can take days. DC1 was only a few hours until I was taken down, but DC2 was 4 days waiting.
I had managed ARMs (one midwife pushing baby into my pelvis, another with the long hook breaking the waters), as babies were unengaged still. No contractions with either, so had the drip.
Didn't want the epidural initially, but gas+air only gets me to 5cm dilated before needing something stronger. For DC1, it was after 6 hours, and I had diamorphine. For DC2, it was 10 hours later (back to back, so slow progress), and I had an epidural.
Eventually, I had DC1 vaginally after 11.5 hours in the drip. DC2 was born via emergency C-section (still back to back, stuck, and starting to get distressed) after 15 hours on the drip.
Both were positive experiences imo.