This apartment is perfect for groups, and is clean and well-appointed. We had no trouble getting in and were delighted to see a spacious, clean and nicely-decorated apartment. The terrasse was great as well for hanging out over coffee in the morning.
Apartment 3 is below another Mtl-owned apartment, so consider getting Apartment 4 if you are worried about hearing people overhead.
Overall, we had a lovely trip, and Mtl made it as easy as possible.