Marie's place is amazing. It is just a 5 minute walk from Tram B, which brings you to city-centre in just 10-15 minutes. It is also walkable distance to Victoire (around 10-15 minutes too).
There is a supermarket and bakery right by the tram station so you can grab a breakfast on your way to the tram. Marie is also very nice, and is very willing to offer help. I had some issues with my bank card and she helped me with communicating with the bank and get the problem solved (my French is bad!); she also went to the TBM office with me to get the TBM pass!
The place is situated in a residential area, which is very safe and quiet!
Highly recommended!