A nice apartment in a great location, is really well presented and the host had great communication. The roof terrace is a particular highlight. Even so, there are some issues to highlight:
1) The stairs: apartment is top floor of tall building (around 100 stairs total). Staircase is narrow and spirals. Acceptable if young and fit, but not recommended for kids or older etc
2) Ad suggests 2 bedrooms: actually a one bed with front room acting as second "bedroom".
3) noise: there are quite a lot of bars that play music until 3AM. Particularly invasive in the front room (if used as bedroom)
4) sofa bed: not very comfortable with bars sticking into your back. Ok for a night or two, but long stay would be painful.
For one person or a couple, this would be a great place as most the issues above (excepting the stairs) would be mitigated. A person using the front room as a bedroom would be drawing the short straw though.