Of course I am completely in favor of assisted suicide. Not necessarily just for terminally ill patients but those who have absolutely zero quality of life and only experience life as a series of horrible painful stressors.
It's every human being's right to choose when to end their own life. And after all, death is just the cracking of the outer shell and release into the world you always wanted to live in - it's a freeing of the spirit within and a necessary part of one's life cycle.
There's always going to be some problem around people changing their mind but, I think most people opting for such a procedure would never change their mind about it. You'd have to have them sign release and total consent forms, and I can already see this thing getting balled up in wads of red tape that will make it virtually impossible to carry out.