My stay at Colette's (for a month) was very good! She was very accommodating about my check in and check out times even though they were last minute times due to trains and work. I could contact her easily on whatsapp and she'd reply very quickly. I did not get to meet Jessie but she was very nice if I ever had any questions. I pretty much had the whole apartment to myself apart from a few days when one of Jessie's English friends stayed who was nice and we had no issues.
Colette was a great hostess even though I only saw her at check-in. She gave me advice on what to see and also what websites to look at for accommodation as I was staying in Paris for several months as part of my university studies.
The actual apartment is in a great location, very young vibe with canal Saint-Martin around the corner and as a young woman I felt safe returning home by myself as the flat is 30 seconds from Goncourt (line 11) metro and about 5 min walk from the well connected République. I walked to work in the marais in the 3rd arr which is only around a 25 min walk.
The apartment is a great size for Paris and Colette provided me with linen and towels. It's a very spacious room- good value for money for Paris! It also has a washing machine which is a rare commodity. Kitchen is well equipped. Of course the apartment doesn't look exactly like the pictures as it is a bit older and less clean but that is to be expected- the apartment is still nice.
The only things I would say are that the neighbours next to Colette's room can get a bit loud as they have several young children and argued a bit and the walls are fairly thin as is the case in old Parisian buildings but I slept well anyway. Also, the bathroom is very small and a bit old, you have to angle yourself to be able to sit on the toilet to pee but the shower had good pressure and everything was functioning.
Overall a very enjoyable stay and I would recommend!