My first trip across the pond to Goose was on the 7th seat, as my new Captain was ex-Cyprus and being screened into Winter Ops. It gave me an intro into 'life down in the hole' and also use of the sextant. As prescribed in GASOs we went through the Crew Escape Trainer a few days before the Ranger began.
Years later as a Captain I was on an annual Refresher visit in Groundschool. The Pilot instructor, many years my senior, remarked that he had NEVER had any suggestion from his rear crewmen that they would appreciate any more than the minimum number of Escape Trainer sessions. My fellow Captains on that Refresher week concurred!