The appartment is cosy and clean. The location is perfect: at the corner of the square with St André Cathedral, within 5-10min walk of the old city centre. The appartment was on the upper floor of the building (I think 4th floor), which was a lot of stairs. The stairs steps are comfortable very big, though.
We moved the (very comfortable) mattras to the middle of the room for a normal ceiling. The place is definitely big enough for this.
The toilet room is very tiny.
The self check-in and check-out were very smooth and clear.