Brice and Andy's place is a studio apartment on the ground floor of a small apartment building in a slightly tucked away part of the 20e. The apartment itself was great: immaculate, very cleverly laid out, excellent wifi, renovated bathroom -- everything you could reasonably expect. The bed is on a mezzanine that is accessed via a homemade staircase that seemed a bit daunting at first, but was perfectly manageable, even for a less than supple 60 year-old. Communication with Andy was excellent: messages were answered promptly, and I very much appreciated how flexible they were in letting me in early!
The location is ideal. Two metros are within 5-6 minute walks. Turn out the front door one way, and you get to a quaint little "place" with a couple of great café/bars. Turn the other way, and you get to Parc de Belleville and its stunning views over Paris. Belleville is one of the best neighbourhoods in Paris, and you are right in the thick of it! I would stay here again.