A great deal of the answers are far too long. Sometimes they use an entire page for a 5-6 mark question.
They should try to keep their answers in line with the amount of space given for the question (2 lines per mark).
Their diagrams and calculation answers are usually quite good.
It would be really good if for some of the higher mark questions (maybe 5 marks+), they could do exemplar responses for Band 4/5/6 -- just to see the differences between the responses. I.e., in order to correctly 'analyse' what should you do? It is all well and good rote learning the answers to past exam questions, but knowing WHY the answer did or did not get full marks is more important.