The Hotel Marconi is 10 minutes from the Pirelli building and 15 minutes from the Central Station. It's also about 10 miutes to the Repubblica underground station.
The staff are very friendly and most seemed to speak English - except for the breakfast attendants.
We basically walked through a minor maze to get to our room. Which turned out to be small but comfortable. With the standard bed, desk and chair, cupboard, TV (supposed to be satellite, but mostly Italian and German channels), and minibar.
What was supposed to the open air breakfast area was under construction, but no construction was under way (or keeping us awake).
The indoor breakfast nook was charming, but breakfast itself was something I was not accustomed to. There was quite a lot of sweet pastry to be had, but the coffee was good.
The hotel is back to back with a church which has an hourly and half hourly ring. Very convenient as a wake up call at 7am. Fortunately, it didn't toll all through the night though.