I too had the procedure - I'm almost at the 2 month post surgery time frame - and while I have read many fabulous outcomes in my pre and post surgery research... I seem to have fallen into the worse after category. I'm definitely in more pain than prior to surgery... and now I have piercing shooting pains in the back of my neck and head. The sensation in the areas that were burned are extremely weird based on the different types of touch... for instance, if I very lightly touch the area... it hurts like an open burn being touched... if I tap it, it feels numb... and if I press it hurts like a bad bruise. I feel like I don't have the neck strength I had before - and I can't make it through a day yet without having to ice and take pain meds.
I know for myself - this is not something I would do again - but having said that... if I hadn't... I would have always wanted to know if I would have been one of the lucky ones this could have helped. Yes my pain is worse now... and for how long I do not yet know. But if it had helped - how fabulous that would have been.
The decision is individual... Google rhizotomy as well as rhizotomy failure.... you'll come up with different results giving you different information.
Good luck