A very light and spacious (by Paris standards) apartment with a nice view of Sacre Coeur in the distance. Good location in the Marais and close to Place Des Vosges. It was also very quiet. Both the bed and sofa bed were comfortable. The shower worked well. The host provided coffee, milk, orange juice, biscuits and other basics. Humberto also gave us lots of recommendations for places to go and things to do and places to eat while in Paris. He was a very good communicator.
The only thing I would warn guests about is that the apartment is on the 6th floor and there is no elevator so anyone with mobility problems should not stay here. However, if you are reasonably fit and you take the stairs slowly, they should not present too much of a problem.