Lovely apartment and great communication and helpfulness from the owner. As previously noted, the stairs up to the loft are very steep and wobbly, but once we had done them a few times, we worked out a knack to getting up and down! For info (as we were 4 adults and weren't sure) there are 2 double bedrooms in the main area and in the loft, one big open space with a double floor mattress and a single bed and also a small toilet/sink room.
The location is amazing, as are the views. You can hear the metro quite clearly but it stops by around midnight until 6am and didn't bother us much - the location and apartment more than made up for it. A recommendation is Angel's Share bar at WoW - fantastic views at night.
Thanks - we will definitely be back!