Very convenient location with short walks to (at least) two different major metro lines heading south and east. The apartment itself was great as well, we enjoyed being able to watch the Eiffel Tower flashing light show on the hour from our room. :-) And the hospitality was outstanding! Adrian and his friend Pierre were extremely accommodating and helpful; they even were able to meet us 30 minutes early for a late night checkin early with very little notice.
TL;DR: great stay, great host, highly recommend.