The apartment is located in the center of Budapest in the 1st district, not far away from the Buda Castle and other tourist attractions. Nevertheless, the street it's located at is not too noisy during the day and quite calm at the night time. You have everything you need in 5 minutes walking distance - shops, restaurants, cafes, tram and bus stations to go anywhere.
Our host met us on time just near the building, explained everything in perfect English and was very kind and helpful.
The apartment is very well equipped and cozy, certainly it was carefully prepared for a family with kid(s). There is a living room with an american style kitchen, bedroom, kids bedroom with a 2-floored bed, two bathrooms (one with jacuzzi-bath!) and a cabinet. The kids room is absolutely adorable, our 2yo kid totally loved it, there's plenty of kids things like a small table with chairs, some toys etc. Also one bathroom has a small sink for toddlers, toilet adapter, a pot and other things to make family life easier. Kitchen area is fully equipped, there's just everything. The parents' bedroom is very comfortable with a window facing the backyard so no noise whatsoever. Overall, the apartment is clean and spacious, ideal for a family stay. Fast internet and big TV were a cherry on top of the cake.
Tip: Though there's a parking space near the house, it may be a bit tricky to park. Also you don't wanna use a car in Budapest - it will be useless, you'll just stay in the traffic. The public transportation is excellent and easy to use, better than in Paris for sure.
As a summary - we absolutely recommend this apartment for a family holiday in Budapest.