Paul's apartment is located on the 15th arrondissement of Paris and is no more than 5 mins walk from cafés, restaurants, supermarket, minimarkets, ATM, bank and all you need to have a comfortable stay in Paris. There are three metro stations nearby between 5-10 min walk as well as a bus stop just around the corner. Walking from Paul's apartment to the Tour Eiffel will take you 15-20 mins approx.
The apartment is on the 4th floor of the building and can be reached by stairs or elevator and is very comfortable for a max of two people. It has everything one needs to just relax, cook something etc.
All in all I strongly recommend this option not only because it is a great place to stay and Paul is always available (even though i didn't meet him personally he was answering every single question or phone call regarding the apt or the neighborhood) but also because of the privileged location it has in the city of Paris.