If I were you I really would make the effort to talk to those that have been to Cananadian ATC and subsequently came back, cause they all hated it. If memory serves correct only 1 or 2 still remain.
This was mainly due to the appalling way they were treated as U/T's. One guy turned up at a house party for a colleague on his watch who had just validated to be told he was not invited as he was a U/T.
As a U/T they were not allowed to sit with valid ATCO's and at certain tables only. Valid ATCO's had no real interest in validating new people cause that meant they would get less overtime. BE WARNED...