The sofa bed is old and pretty uncomfortable, and the furnishings are in need of a refresh. The shower leaks onto the bathroom floor, so beware! Check-in was also complicated as the cleaner was still in the flat until 5pm.
If you just want somewhere to crash in central, I'm sure this would be ideal. It's a great location, and the roof terrace is lovely. The pictures describe it pretty accurately - it's a small studio flat with only the sofa bed to sleep on.