Having had an ablation,some women don't tolerate it well,I was ok but two other ladies in hospital at the same time as me were in terrible pain and the end result for me was,it just didn't work.
I don't know enough about the coil to comment but having heard bad things (as well as good) that was enough for me not to get it but my fibroids were huge and I was told a hysterectomy would be the best option.
The op itself was fine, I had no adverse reactions at all and as it was done vaginally, I got home in 24 hours,up and walking about the very next morning.
I'm not trying to sway you in any way,it's a decision that is up to you and you alone,I'm just giving you my experience xx