Back on topic, at my school it's SOP (well, it is for my FI and I believe it is for the others as well) for all students to have a couple of hours of training with some of the other FIs in the school around 10-15 hours in, even if the training is going well, to enable the student to have a look at possibly slightly different style of flying and give them a reference point to compare their own FI to to see how good the chemistry and progress is.