Stefan's apartment is absolutely amazing! Very stylish, easy to reach with desirable stations not a long walk, and super modern and tidy. Unfortunately we didn't get to meet Stefan, but he was very accommodating with our early arrival and gave us all the information we needed over message before we arrived in Berlin. The apartment also had great comforts such as the full size kitchen and plenty of travel guides - even a washing machine! It was perfect for our short 3-day stay.