My family and I had a lovely stay at Martin's place. It was so convenient to the U train, less than half a block. The small kitchen area had everything we didn't know we needed and was so well-appointed with an electric kettle, microwave, small stovetop (which we didn't use), coffee maker, mini fridge, as well as dishes and silverware. The wifi worked great, and there were even maps and lots of pamphlet information about stuff to see in the city. Martin had provided basically a mini tourist info station. The bathroom was clean and provided plenty of storage. There is no a/c, but the fan and the interesting top open windows provided plenty of air. The beds were comfortable and the blackout curtains did their job in the longer daylight hours. Martin was also super responsive. He provided a video on how to check-in and get the keys out of the lock box. He also responded to our inquiries about the nearest pharmacy quickly. We had 2 days and it wasn't enough time in Berlin. I will definitely stay here again should I find myself in Berlin in the future.