The location is awesome - you're right near the Arc de Triumph and walking distance to the gothic area and a number of public transportation options. It opens up onto a really nice courtyard and the bed is quite comfortable. The neighborhood felt safe - even late at night - and the setup was great for us and our baby.
The negative is that Habitat Apartments were pretty skimpy on the amenities. We had to go out and buy pretty basic items - hand soap, toilet paper, paper towels. The kitchen was also very limited - there were no staples like salt, pepper, oil, etc.