Federico's apartment was fantastic! Inside, it was impeccably decorated, comfortable beds, and spacious room to sit and hang out. The kitchen and bathroom were very clean and had all the essentials. Public transportation is literally right around the corner, as well as a grocery store and convenience store (to buy train tickets, snacks, etc.). We were three women and fit very comfortably. Aside from the apartment being great, Federico was the most gracious host. He let us in without trouble, despite us being a little late to arrive, and emailed us throughout the week to check in. He gave us more than enough recommendations for restaurants, bars, museums, galleries, etc. and went out of his way to make sure we really enjoyed Berlin. Thanks Federico!