One of the best train stations I have ever been to. From the moment you step off the train, you feel welcomed by the Montreal workers. You then take an escalator up to the main level, and you are welcomed by a little old man with a french accent who says "welcome to Montreal". It really made our day, after spending 10 hours on a train.
The station is a major hub not only to mass transit, but to other parts of Montreal's amazing underground city. Directly upstairs is the Fairmont Queens Elizabeth Hotel. I stayed at that hotel, so all I had to do was take an escalator upstairs from the train station and I was in the hotel's lobby.