We had a really enjoyable stay in Nicolas' apartment. We didn't get to meet him in person, but he was very friendly and accommodating considering we missed our Eurostar and arrived late at night. The instructions to get into the building were very straightforward, and its perfect if you want to be close to the train station.
The apartment is as pictured, and feels lived in, which is always good.
My only concern would be that the (beautiful) natural wood shelving leaves a scent that could possibly trigger asthmatics, though opening the windows for a few mins got rid of the scent pretty quickly, so its not a major concern.
Would definitely stay there again. There's a great burger joint right across the road too.