Pier's place was right in the middle of Gothic Quarter, you can easily get anywhere from there by walk. A lot of shops and restaurants in the neigborhood.
Pier's appartment is just as described. The guest room is small, but nice and clean. The beds were comfortable, just keep in mind they were single beds put together, so they were not perfect for a couple.
Pier was extremly friendly, we received a lot of useful tips about the city and local food from him. Do not hesitate to book his room.