It does sound so ideal to me being able to exit peacefully when the time feels right. It should be seen as a human right. We shouldn't have to suffer so much in finding ways to leave this cruel, nightmarish existence that we never asked for, the problem is the society that wants to force people to live and prolong their misery as much as possible.
For many people life could never be worth living and this fact should be accepted and those who view suicide as being worse than suffering which is simply inevitable in life, are in denial. But yes, it would be the best having a peaceful exit, as humans we deserve the option of being able to take control over our lives and finally be free from everything without having to worry about risks of the method failing.