Alex's Havana apartment is in the best location. I like that it is about 5 stops from the HauptBahnhof, enough distance to make it a bit less busier and more local, but not enough that is becomes time wasting getting to the main attractions. Subways are amazing. We went to Alte Pinakotheck museums which is a 10 min walk from Odeonplatz, two stops from Pinzregenstrasse. The apartment is handy to the Gastheig auditorium where I went to hear a concert. There is a great bakery 200 m from the front door and supermarkets a few blocks away. We enjoyed our stay immensely.