We have thoroughly enjoyed the duplex though our stay in it was way too short !!! Matt very kindly accepted to accomodate us literally at the last minute as well as allowing us to check it very late in the evening. The place is as described and on pix but it's actually bigger. There's a real bed downstairs and the double bed in the bedroom was very comfortable. The duplex was spotless.
What i liked most about the place was its quietness and real feeling of having our own place, it's really too bad we could not enjoy sitting outisde because of the weather (all the more reason to come back in summer !!).
The place was extremelly well located near the metro station which has a link to all the other metros lines and RER, you can get from south of Paris (where the place is) to the North side in less about 20 minutes or so which is quite a luxury in Paris. There's a bus station right in front but we didn't use it.