We recommend Xavier's place. We had a very pleasant stay there and we believe others will too. Xavier and his team were very good with contacting us and arranging an early check-in. That was great. The unit is wonderfully located for exploring the 5th and 6th. It is easy to get there direct from CDG by RER B to Luxembourg and then a five minute (or less) walk. All the shops you could need are very close by. It is however a small place (as advertised) and you won't be entertaining large dinner parties. The kitchen is functional, but minimal. You won't be baking your own baguettes. The unit was well supplied with the basics for a long stay: vacuum, iron, toaster, microwave, washer/dryer: those sorts of things. The only negative we had is not really under Xavier's control. There is a lot of noise in the building and from the adjoining courtyards. Gardienne's are emptying trash at 5 or 6 am everyday. Younger people are going up and down the stairs at three and four AM. People have parties with music that can be loud and go late to the night. Some of these are in the building and some are just the echos from the adjacent buildings across the courtyard. Mostly they took place on weekends, but there were definitely some nights when it was hard to sleep. For a younger person, graduate student maybe, this might be a plus that there is some life in the building, but for us older folks it was not an advantage. There was also cigarette smoke wafting in from the smokers in other units. We did enjoy the young man downstairs playing his violin, and the woman somewhere practicing her arias. It is a lively area, and one should think about whether that suits the purpose of their visit. With that in mind we can recommend it and would consider renting there again.