Joffrey was very responsive when we had a last minute train reschedule due to a strike - we came a day early on short notice and our reservation was easily amended within half an hour.
The location is great - sandwiched between the great bars and restaurants of the Marais and the 11th, very walkable and connected by transit.
The place itself is tiny - unexpectedly so. Not one for you if you plan to cook. It is quiet as you face the courtyard, which is great.
In terms of cleanliness there are some stains on the carpets, and the tiling in the bathroom definitely needs a good scrub to clean the grouting. Generally the place was clean, it was more that it needs a little facelift.