We had a great time in Sonia's apartment - it is as spacious, comfy and colourful as it looks in the photos, a pleasure to come back to each day. We prefer to cook in than to eat out, so we greatly appreciated the kitchen, which is not only well-designed, especially for those who like to cook and talk to their friends and family at the same time, but is also equipped with all the appliances and utensils that cooks need. We also greatly appreciated the well-stocked drawers and fridge, full of stuff that was either provided by Sonia and Karim (fresh juice for the morning, for example) or by previous guests (way more than the usual salt, pepper, bottles of oil and vinegar).
The beds are comfortable, as is the bathroom, the living room and dining/kitchen area, and the decor is both chic and cheery. We loved it.
Communication with Sonia was prompt and courteous, and Karim was very welcoming when we arrived.
The lack of stairs (except for a couple of steps down to the second double bed) is a boon for those with heavy luggage or mobility limitations, as is having the metro close by. We loved the neighbourhood - a place where people live, shop, eat, talk and go about daily life.
We have no hesitation in recommending this place for your stay in Paris; we would certainly come back again.