Great stay at Claire and Peter's ! We spent 2 nights there and everything worked very well.
The apartment has just the perfect size for 2 people and everything is well refitted. It's location is absolutely perfect in the Marais area, close to supermarkets, restaurants, café, cute little shops, subway stations and sights. Plus, it is decorated tastefully ! However, you will have to be fit to reach this little gem as it is located on the 5th floor without a lift. Be prepared to muscle your legs :)
We didn't have the chance to meet Claire and Peter during our stay but we exchanged some mails and texts with them and everything was clearly explained and we always got quick answers to our questions. We also received a mail from Claire with instructions and useful things to know 1 day before our arrival. Very good idea !
We really appreciated to leave our big backpacks in the apartment while finishing to visit Paris as our train was at 5pm.
We recommend that place without any hesitation !