Since yeast will generally eat any sugar you add to your must/cider, adding sugar for sweetness in home-brewing isn't really an option unless you get more elaborate and pasteurise, etc. So artificial sweeteners are the obvious option to allow bottle-conditioned sparkling cider with sensible ABV and a nice level of sweetness... especially the modern trend of sweet "fruit ciders".
But what artificial sweeteners are commonly used and easily purchased? There are so many used commercially and some have noticeable flavour (in a bad way) to different people... for instance my wife loves Sprite Zero and Coke Zero but finds other diet sodas have a nasty after-taste from sweeteners.
What sweeteners make sense for home-brewing, and what are their pros/cons? How should I choose which one to use?
They need to be non-fermentable