1)we have asked for a blue room and it was confirmed by receptionist Irina but on arrival we got a small brown room with a window view to the wall with tubes. We asked for the other room, she refused to give it to us, saying maybe next day but of course nothing happened. The room we stayed in was ridiculously small.
2) Elevator was broken all 3 days we were there and it was pretty difficult to go up on the 3d floor, i can imagine how difficult it was for the people who lived on the 6th floor. Nothing was proposed as a complimentary for this, even though we asked to maybe at least not charge us for the beer we take from the fridge as a compliment for that the inconvenience, but Irina said NO.
3)Breakfast is poor and a lady who works there doesn't speak a word of English, so you cant ask for anything without a translator. It took me 15 minutes to explain what i wanted with a help of a French guest. On check-out Irina counted 4 breakfasts instead of two and if i didn't check the receipt, she would just charge me more without a wink.
4) And the last but not least, 2 months before i booked two rooms in this hotel, i asked to allow us to cancel our room free of charge, as they couldn't charge the second room of mine from the other credit card but Irina refused, while there was enough time to resell it, so me and my boyfriend had to stay in this hotel and my parents whose room they couldn't charge had to go to another hotel because Irina was very rude and said she will not accept this reservation anymore. So we had to spend time separately and not in the same hotel while my parents don't speak English and it was problematic for them. I have never met such a rude and unprofessional receptionist. And after all that she cancelled our reservation too, while she has charged it successfully and only after a call of Booking.com she reinstated it and admitted she made a mistake.
Location is very good, just 15 minutes walk from Montparnasse and 2 minutes walk from the metro station. Also close to ATM and a lot of nice restaurants. A very good and kind night receptionist, an old nice man,i dont know the name.