I'm all warm and tingly despite the winter chill prevalent in the story. I've never been to Quebec, but I felt like I was right there with them, visiting and seeing the sights. It didn't matter that I couldn't visualize the places for real (or even knew what they were) because the imagery was vivid regardless, and it transported me.
I also like all the little moments between them, this being one of the standouts for me: "I think I can entertain myself in your welcome absence," Severus murmured as they walked out onto the street, earning him a gentle shove.
I also liked this notion -- it's how I feel about Harry, too: Severus knew he had what half the wizarding world wanted