Unfortunately, it seems that this just provides an extra year of life or so.
Of course this is better than nothing, but it is not a cure.
Moreover, the link provided by another poster to an article that discusses the side effects, shows that they are unpleasant.
Still, an extra year of life may provide a chance to survive until the appearance of a better solution.
It's an extra 6 months or so, and it's almost certain a better solution won't be come available in that 6 months, and even if it did you are very close to death and unlikely to recover even if a miracle cure is developed. In the meantime you are in intense pain and suffering wild side effects.
The abstract of the article claims that the median value of extra life time was between 8 months and 9 months.
Therefore those well above the median might have reached an extra year of life.
I agree however that because almost all of them (96%) had severe side effects, many people would prefer to not choose this kind of life extension.
My own parents were such people.