Took my 6 and 7 year old sons to see it on Friday night. Checked the rating first - PG - no problems there then, I thought - won't need the usual Mum and Dad only viewing to check suitability. ... spoiler space - scroll down ... Both of them were pretty scared by the dementors and when Lupin transformed into the werewolf and was howling then fought with padfoot. In fact, I had to leave with one of them at that point because he was hysterical. He is quite highly strung but on the other hand he sat through all 3 LOTRs and thought they were brilliant. I was slightly surprised, given that LOTR was given 12A, that HP3, which I thought had a stronger horror content was given PG. I suppose it is the level of violence that earns LOTR a 12A - but in my opinion children these days are more exposed (and used) to 'fantasy' violence through their cartoons and video games and so on but the same is not true for 'horror' content. Are we in need of a more detailed rating system - such as is on the back of DVDs where it breaks content down into categories - horror, violence, swearing, sexual scenes etc? As for the actual film (what I saw of it anyway) - thought it was pretty good. I can understand some peoples confusion (see the other HP thread) about the relationships not being explained properly. I only knew what was going on because I've read the book.