I haven't seen the film but know all about stammering having had one for many years. It was awful in class and I went to a "good" Grammar school. Being really quiet in class, not being able to engage in real conversation and discussion, struggling on certain words (Why does your name give you problems?), having to alter what you are going to say, knowing you are intelligent but not able to say what you want to say and teachers not really accommodating your needs. I remember a teacher getting me to do a really difficult role when we were doing a class reading. I hated that. Having to do the morning reading (yes - that kind of school) to a hall of 1000 pupils because everyone did. In my case, I do believe it reflected deep down psychological issues - my stammering has stopped recently as my general confidence and self esteem has grown. So I hope the film does allow people to see stammering for what it is and not as a comedy issues as in Open all hours.