Methods can fail, but of course many people have succeeded in ctb. I think knowledge and planning of the method is needed to be successful. Of course nobody should have to resort to methods that could fail in the first place, we all deserve a reliable, peaceful exit, but in my case I will read about my chosen method in order to feel more confident. I think when the time comes for me to ctb, I will be desperate by that point as of course ctb is very difficult. I think that mindset of complete hopelessness will mean I am able to go through with it. I wish you the best, whatever happens.