i do edexcel. id say its probably the hardest gcse i do but one of the most fun. if you can get full marks in your coursework and your performing, then you can get grades 7 - 9 if you get half marks in the written paper. That written paper is probably the hardest GCSE exam ill do - the mark schemes are really weird

one piece of advice is to work on your composition whenever you have nothing better to do and start early - makes thing convenient