Stayed here last weekend and left feeling a little underwhelmed.
Booked the basic room and did not get upgraded - I know it's subject to availability, but also no welcome gift in the room or anything to make me feel appreciated as a Titanium member. Again, first-world problems, but I got more recognition at the Courtyard Gare de Lyon...
Room itself was very good and comfortable, and I liked the breakfast: I don't eat lots in the morning, so the set option with eggs made to order was perfect. Coffee was the only low point - very watery and weak.
Late check-out was given without any issues and reception/door staff are super friendly.
Not sure if I would return. I'd probably go back to the Marriott Champs-Elysees nearby which is a lot cheaper but offer a very similar experience in my opinion.