The link in short:
Katie was a model and budding TV presenter with a glowing future ahead of her, but in 2008 a vicious acid attack destroyed her face, career and life as she knew it.
http://www.channel4.com/programmes/katie-my-beautiful-face
I would not wish what happened to this lady on anyone, but I expect the documentary from what I have seen on the snippets, to show how she has changed, (personality, outlook on life) as a result of the experience and how people now react to her.
What I don't think the documentary will show, is what sort of a person she was before the incident. ie did she do a lot of work in the community work?, Was she vain?, did she turn her nose up at people who she regarded were beneath her?, Or was she a positive role model in the community.