Verbatim process notes when training?

I'm about to start a BPC qualifying training in the UK, and I'm curious about the need for trainees to keep verbatim 'they said, I said' process notes for use in supervision.

In my current clinical work I don't make anything close to verbatim notes, and I'm concerned by how unwieldy trying to accurately recall 50 minutes of dialogue feels in my imagination.

For those who have been through trainings that encourage verbatim note making for trainees, how was it? Do you have any note taking wisdom to pass on? To what extent did you find note taking becoming a site of countertransference?