Working in a building connected to the underground city, I sometimes will go through Centre Eaton either to have lunch or will pass by on my way through the underground tunnels to Place Montreal Trust or Place Ville Marie.
I don't do a lot of shopping at Eaton Centre. I will occasionally drop by the La Source store. Some of the places that I've also gone to when I'm at the Eaton Centre, will be at one of the food court restaurants at the food court, the Lindt Chocolate Store, Tour de Jeux (game/toy store) and the Yeh! soft yogurt ice cream place. There is a wax museum in Eaton Centre (Grevin Montreal) that I've wanted to visit but as of the date of this review, I have yet to visit that place. There used to be a movie theatre here that I used to go to but I believe that the wax museum replaced it.
This mall is well maintained and I've never had any issues here. There is free WiFi within the food court area.