For me they've messed up in a good and a bad way, and fortunately the bad one is made up for.
A remark of one of my papers has caused an increase of FIVE marks, and of all subjects, it is maths (C3). The first marker must be high or something......
On the plus, there's no way I got 70% in M1 when I missed a whole question and missed half of another 3 questions, and ultimately only got 1 question out of 7 completely right, so thank you Edexcel for the gift.