This was the first place I visited while in Montreal. I didn't grow up Catholic or attend a church with a giant building so every time I visit churches like these, I'm at least a little amazed. We did a lot of random exploring throughout the church. I'm not going into detail about each place that we went to, but I think it's definitely worth exploring the entire building. As I've been looking at attractions in Montreal, this definitely should be a lot higher on the list.
The view of the city from here is absolutely beautiful especially at sunset. For any visitor to Montreal, I definitely think this place is worth the visit.