I had an ecv with my first. And have decided I'd never have another, and would always opt for the elcs.
It was very painful, as baby was so wedged down, with the bum right down in my pelvis. They tried pushing up from inside me (through vagina) to lift the baby a bit to be able to turn, but it didn't work.
It may be different if the baby is less firmly stuck down though!
My feeling now is that there could be a good reason baby is breech (cord length/position, amount of fluid, shape of womb etc) and so I wouldn't interfere next time.
Elcs, which I had as baby didn't turn on their own, was a lovely experience and was very relaxed. The recovery is a bit rough, but not as bad as I'd anticipated. Just sore across the tummy for about 3 weeks, but then able to move around pretty much as normal.
I would however try everything I could to see if I could get the baby to turn on its own :) I scrubbed the kitchen floor like never before!