The apartment is lovely, ideally situated in a reasonably quiet part of Paris. (If Paris can ever be said to be quiet). There is some road noise but you are in a capital city after all) 5 minute walk from Place de la Nation and Metro lines 1 (great for central Paris Louvre, Notre Dame,) 2, 6 (good for Eiffel Tower via Trocadero Gardens (one of the best views of the tower) and 9. Also not far from Bois de Vincennes (via line 1), one of the largest parks in Paris. Also link to RER line A (but line A and C closed in central Paris at moment due to engineering works, Metro OK for getting around.
There is a direct bus to CDG from Nation but we didn't use it. We travelled between CDG and Nation by RER B and Metro Line1 which worked well.
On the same street as apartment there is a U supermarket and also a very good Boulangerie for you morning breakfast supplies.
The Apartment is up 3 flights of steepish curving stairs so if you cant cope with stairs it possibly isn't for you but we had no issues. The pictures are a good representation of the apartment which is on 3 levels. Main living space very comfortable. No TV but who comes to Paris to watch TV. Good WIFI so we streamed a film on our laptops in the evening. Kitchen well equipped with cooker, fridge dishwasher and washing machine. (no microwave but we didn't need one so no problem).
Bathroom OK (bath with a hand held shower) and there is also a second toilet next to the apartment entrance.
Two of the bedrooms are in the roof space so did got very hot during the hot weather (above about 28-30 Celcius) Temp was around 30-35 for a couple of days while we were there, temperature in apartment fine when in mid 20's outside) , Julie and Michel supply a fan that you ca use which makes it more bearable if hot.
My wife and I were holidaying with older children (ages 24,20 and 15) and enough space for us. WIFI good so they were happy.
This is a family home and so was equipped with all we needed. and you are surrounded by the things that make a family home. Julie was excellent at communication and it was a pity we did not get a chance to meet them in person before we left.
Excellent place to stay and can recommened, will definatly book again when (not if) we come back to Paris. (Still one of the most beautiful cities in the world)