The large loft-style space is characterful and spacious. It's in a hilly part of town and there are a lot of stairs in the building so, as others have mentioned, you'll get your exercise in. It is within walking distance of most central attractions, though.
The flat was comfortable enough though with our aging, aching bones, we did find the mezzanine bed area a little awkward as you can't stand up straight there. You also can't stand up properly in the space beneath the bed making it a slightly dead space - I can't help thinking it would all be better if it had been kept all on the one level. If you're young and agile (or not too tall) it could be quite appealing, though.