Location: Hard to beat, a street for food lovers, easy ways to almost everywhere including three train stations, metro lines, Sacré Coeur, and Les Grands Boulevards.
Best of the apartment: Comfortable beds, hot water, water pressure.
Accommodating Hosts: Allowance to drop of bags, very nice greeting from Edgar staff, good communication.
Value for money: It sleeps up to six people in comfortable beds in one of the best locations in Paris, so I think the $400 / $500 per night is a good deal especially when compared to hotel prices.
Be warned: Third floor in Paris is the fourth floor in North America. There is no lift and the staircase is steep and dangerous.
Also: Two bathrooms is really two shower rooms and one toilet.
Regardless, a great place for a family to spend a week in Paris.