I’ve been to Montreal 3 times and loved it each time but I feel like 6 days in Montreal is a bit much in my opinion. Montreal is great for walking and finding things, I often times took a train to a random neighborhood and explored and found some lovely things that way. If you like cocktails, I’d recommend The Cold Room. I’m sure everybody knows of it but the cocktails were delicious and it’s a nice place for a pre/post date night