Stayed 3 nights after a business trip in Switzerland. Arrived from train to Gare de Lyon and took a taxi to the hotel. Reasonable cost of 13E.
I had a charming room on the 4th floor facing the interior, so no view, just another building, but it was very quiet. My room was huge with a king bed and another single, so 3 could easily fit in here. The bed was comfortable. The bathroom was large too and very clean. Internet access is good. No air conditioning in this hotel, but was not an issue during my stay as it was cool. There is a safe in the room. Complaint is the hand shower as it was awkward. Also a caution if you are tall, the angled beams are not ideal. I'm 5'4" and I banged my head because I wasn't careful in some spots.
I had breakfast for 9.5E and it was reasonable. The fresh squeezed orange juice was delicious. I also ate in cafes around and their cost is 6-7E but you don't get the same amount of food, but more ambience.
As others have said this hotel is very convenient to the metro and you can walk to plenty of main sights. I loved the Maris area. I felt very safe here.
Staff is great and very helpful. The lobby has a computer and printer to do check-in.
Can walk to the Chatelet les Halles to catch the RER to the CDG. Which I did, but with the train strike, the journey to the airport was not as convenient as hoped.
I highly recommend staying here, just not in the hot summer.