We stayed for 3 nights and best thing about the place is its location. There are department stores and cafes on the same street and most of the attractions (Louvre, Notre Dam) can be done on foot.
The apartment is spacious for a family of 3, and has most of the amenities available to make your stay comfortable.
Juan is very quick to respond too. And always willing to help. But he is available only on text/email.
Few watch outs - during our stay the heating didn't work in the living room. The management of the property is in the hands of an outsourced vendor (Lucky homes) and the guy they sent for the check in was not fully familiar with the apartment, he couldn't even switch on the fridge which we had to figure out on our own with some hit and try.
The above niggles aside - our stay was largely good