Mariana's place at Palermo was great. It's in a relatively quiet area and only from a walking distace from some of the central places, f.e., Soho. There are plenty of services and busstops, and in addition, the subway station is nearby.
The actual apartment is spacious, reasonably priced, and everything worked well. We loved the balcony.
My colleague and I stayed for a month and the place was perfect for a two person business trip. I recommend Mariana's place!