From before we booked to the end of our stay Boris and his 'helper' Alex were absolutely fantastic. They both responded really quickly to texts and emails, gave lots of helpful advice and were really friendly.
The flat itself is really well located, we could walk everywhere, although walking to the Eiffel Tower did take a long time, we did it in stages as there is plenty to see on the way! Being next to the Marais was also fantastic, and after going to the Latin Quarter on our last night, we realised HOW lucky we were staying there! The street is really quiet, and the double glazed windows work really well. It is light and airy, the bed is really comfy, everything you need is in the flat, including a restaurant guide. It didn't feel at all cramped, and I suspect is larger than most apartments in the area, we did pay a bit more for the extra space but it was definitely worth it. We hope to be back!