Krisztina's place is amazing and I truly felt like I was at my own home while staying there. The bed was just paradise, super comfortable to sleep in, specially after tiresome days walking around the city. It is perfectly located, in just 5 minutes you can reach the U7 and after that you are basically just switching between different lines to get anywhere without walking too much as Berlin is super well connected. But the best part of the stay was the host, Krisztina. She is such an amazing person, always there to help or give you useful information. I highly recommend this.