I am a huge advocate of end of life self determination.
My mother had a neurological degenerative disorder from which there was no coming back. She would have happily ended her life, with medical help, a long time before her actual death had it been available. She could not do it herself due to personal experiences and being from a generation who 'owed' it to those who fought in WW2 (not something I would be swayed by).
It took her 8 weeks to die. She was bed ridden having refused any more medical intervention. We (her immediate family) would have much preferred if she could have done similar to Dignitas - drunk a potion surrounded by her family, in her own home.
She was fortunate to die in her own home and myself and 1 sibling were there, the others nearby that they were there within 10 minutes.
Under the circumstances, we did her proud in how her end days were. She didn't appear to be in pain - was on a pump with morphine and other drugs - but as her ability to communicate diminished you could see the sadness. And that was hard.
We tried to subtly say to the medical team (I requested a multi disciplinary meeting) that they could give her a 'double whammy' of morphine and we wouldn't object. I really couldn't understand the need to keep her 'alive' just to die??? The expense of the drugs, the community nursing care, the GP, etc. for what?
She basically withdrew the food and water herself as she knew that was the only way and, obviously, as she became weaker she was unable to even suck the sponges we offered her.
Given the options we had, it was the best death we could have hoped for but it wasn't the best death she could have had.