The location was great for me: 1 min walking from the metro (Barbes-Rochechuart). Lot's of immigrants from all over. There is a huge weekly market for fresh produce nearby, that unfortunately I only discovered shortly before leaving. Also a few minutes walking from all the nightlife and the attractions of Monmartr.
As for the place itself, it is nice and safe. I used the kitchen a lot. Sara made sure I'll have breakfast stuff include daily bread (from the type I asked!). It gets a bit cold (mid December) but there are radiators in the room, kitchen, and bathroom.
A nice surprise was a pack of 50 tickets each with map+tour of places in the city. I think I covered maybe 20 so I need to come back and do the rest!