We stayed at Brice's for 4 nights. We didn't get to meet him in person, but we met Andy who was very welcoming. And, although we didn't met Brice, he was always very easy to reach.
The description of the flat is very accurate - yes, it is as cool as it seems. Also, the location was perfect - very close to the metro and with several bakeries, bars, restaurants, etc. at your doorstep.
We really enjoyed our stay and we would definitely go back!