Bertrand's place was perfect for a weekend away - great location, right next to a metro stop and walking distance from Montmartre. Bertrand wasn't around to meet us, but he answered all of our questions before we arrived and sent a friend to let us in. He also let us check out in the afternoon as we were catching an evening train. He really made it very easy for us.
Great experience! The only problem was the beds were a bit uncomfortable, so it wouldn't have worked for a longer stay, but for three nights it was perfect :)