Lovely flat, pretty much exactly what is in the pictures. Pros include: use of a washing machine, stylish space, walking distance of a lot of awesome monuments and attractions, very efficient heating (we went in January so I cannot comment on the airconditioning in summer), nice sheets, the balcony is HUGE, you can see Asia from your bed, etc. The pictures are very accurate.
Also, for the tall among us, ONE thing to consider is if you're above 6ft 4 you might struggle... or you could spend your time feeling like a giant, whatever floats your boat. The ceilings are quite low and my fiance could rest is head on the doorframes. We've gotten used to this anywhere we stay, so if you are also that tall it shouldn't come as a surprise. The ceilings themselves are actually very pretty so it's not a bad place to spend time.
However, the walk-in shower IS wide enough that he could use it without any bother for his elbows which we've found to be the most important thing. We would stay here again if we returned to the old city. We were very comfortable.