We, 2 adults, 2 kids, had a great stay at Kevin's home. The location is very convenient close to Gare du Nord, walking distance to Montmartre, Canal St Martin and lively areas of the 2nd and 9th, loads of good restaurants and bars nearby. The apartment itself is well laid out and set up, had everything we needed (except not quite enough toilet paper!). Although the street outside can be noisy it didn't bother us because the double(triple?) glazing on the windows is excellent. Beds are comfortable. The building is very quiet. Internet and TV great. We really enjoyed the balcony. Good coffee machine with coffee. Great bakery a few doors down.
The communication beforehand was a little confusing because the concierge agency send a lot of repeated messages but key collection was easy enough.
Minor quibbles: towels are not great and the cleaners seemed to have forgotten to vacuum the living room floor.
But all in all we would recommend the apartment.