Seriously amazing central location.
Have you cross checked the price per square meter with the area average?
For a young couple or single person, working centrally and who's main activities include eating and drinking, theatre, socialising out, going to the parks, etc - this would be great.
I'd want to check the light in the living room, how cramped does it feel, are the stairs super annoying.
Check lease and all the usual lease hold stuff like a sink find, what works have been done/planned etc.