I think that there is an unwritten rule that people in their 20s and 30s know, that 5 star review is the default unless it was absolute shit. Something which '

I think that there is an unwritten rule that people in their 20s and 30s know, that 5 star review is the default unless it was absolute shit. Something which 'olds' don't really get. Which is fair really, because they have the graded option, its just us that perceive it differently. Maybe AirBnB would benefit from a binary system plus comments?