I picked up a couple of CP business class award tickets last week (through AS). On all portions of the travel, the ticket says "Check-in Required" in place of seat assignment, so I have no way of knowing whether I am actually seated in Biz Class. For the YVR-YYZ and YQB-YVR portions, the class is listed as U. According to my info, this is a shuttle, seat guaranteed. What does this mean? Are these really considered shuttle flights? What does U class really mean. I plan to call to try to get a seat assignment, but would like to be armed with all the info I can beforehand. Thanks.