Alex's place was perfect for us (clean, confortable rooms, bright...). The location is 3mins by walk from the diagonal metro station and 2 blocks away from the main street. The area is full of restaurants.
The flat is well equipped and the host was so nice. We didn't meet Alex in person but we were in contact all the time (he helped us a lot by making a list of the best sites, restaurants, bars...)
To resume the apartment is in the middle of everything.