in my family we went through this situation. i identified with the three sisters, i saw my family in them.
this movie feels different when u have already been through this with a family member, it hits you so hard and takes u back to that place where u feel so much desperation and fear not knowing how to react or what will happen next.
needless to say, i cried from beginning to end...
u are never really prepared for the death of a family member, friend or whatever. u are never prepared for death.