Pros: perfect location, cozy flat, good equipped, no problems with the neighbours or the host.
Cons: half of the lamps and power outlets are not working (e.g. no power outlet in the bathroom) and the host doesn't care about that, the sinks in the bathroom and kitchen (mostly in the shower) smell very bad sometimes. Some of the equipment that was told to be in the flat was not there (e. g. Nespresso Machine).
Very bad communication with the host and he didn't care at all about things that don't work in the flat after we asked him many times to fix it. Took a week to get the second key as well.
The fact that there are no doors in the two 'bedrooms' is not the hosts fault but very annoying for a long-term stay. Also, there is not enough cleaning equipment to keep the flat clean for a few month for example just a very small vacuum cleaner.
I would still recommend this flat for a short-term stay in Paris, overall it was clean and cozy and the location just perfect, just when you need some privacy this flat is a no go.
Also, I wouldn't recommend this flat for tall people as the ceiling is very low in the two 'bedrooms' and it's impossible to stand there even for very small people.