Very central to everything in Sofia, lovely hotel, that is being renovated but its not really disruptive to the guests, and if you stay on upper floors, those are mostly renovated. We had two rooms, one on the 1st floor, not renovated yet, but still nice and on the 4th, renovated, modern. The staff is lovely, very accommodating. The only thing I'd say is that the housekeeping needs some better overall guidance. They dont sweep the floors so there's dust bunnies everywhere, hallways, at the elevators, in the rooms, and it gets all over you. We stayed a week at the hotel so we started to really notice it.
We only asked to have our room cleaned on night 4 of a 7 night stay and they didn't change our sheets, they didn't sweep the floors and we only got fresh towels because I specifically left them on the floor to indicate we'd like fresh ones. Thats my only criticism or note, the housekeeping standard needs some lifting. Everything else great!