We enjoyed our stay at Delphine's apartment in St Germain. The train station was fairly close, and best thing was that the train line was a good one that connected to everywhere we wanted to go with very few changes. The shops in the area were adequate.
The apartment itself was comfortable for our family of 4. It was neat, had all the facilities we wanted and Delphine is a fantastic host who was very helpful: she allowed us to check in early which was very much appreciated, and we had a lovely chat with her when we arrived. The beds were comfortable and it was lovely to have all the windows open to get a through-breeze at night. Generally the area was quiet.
Some small issues of maintenance were present, such as light bulbs that needed replacing, a light switch cover that was loose and detached itself, and a non-working dishwasher. It would have been nice to have had the use of a fan as we had some very hot nights when we were in Paris. But these are really small things and they did not detract from the apartment or our stay there.