Stayed for 2 weeks for a mix of work and travel ... loved it. Absolutely unique space in a great location, the old building stays nice and cool even when it is 35 degrees outside. Facing
away from the street the appartment and little terrace are both really quiet too.
When going with 4 people, bear in mind that the bedrooms walls are only about 2.5m high and do not connect to the 6m high ceiling ie. you hear every word ... that being for the the two of us it was a perfect loft.