Sarah's place was absolutely wonderful, for the following reasons:
1) It was very well located - 2 minutes away from a central subway/RER hub.
2) Although it was in such a centrally-located spot, the apartment is on a side street, which makes it extremely quiet and perfect for sleeping.
3) Speaking of sleeping, the bed was very comfortable, with a firm enough mattress to get a great night of sleep.
4) It is unbelievable how much storage the apartment had. Many closets and drawers throughout the place.
5) Attention to detail; everything was designed to make this apartment a high-end place to stay (from the nice shower to the choice of appliances). The very easy-to-follow house manual explains (in English) everything one needs to know to use appliances, suggestions for day trips, etc.
6) From the beginning of the process until the end, I was very happy with Sarah's quick responses, follow-ups, etc.
I would highly recommend Sarah's place for business or family trips!