The hotel is situated within the walls of the Diocletian Palace. It is maintained extremely well; it feels just-built. The room wasn't large, but it was elegant and very functional. (I liked the deep desk.) There can be noise from the boisterous in the street at night, but it wasn't bad. You may hear a top-notch a capella choir (of four older men) singing for the tourists, a treat.
Our experience at Hotel Palace Vestibule was simply excellent.
The staff is hardworking and eager to satisfy, including a porter to lead you to the hotel from the nearby taxi stand.