Nina's place was perfect for my four night stay in Berlin. The area on Meinekestrasse is very safe, very close to public transportation, shopping (KuDamm, KaDeWe, etc) , and dining (HardRock Cafe, Italian, German, etc.), and there is a grocery store right across the street. She was very accommodating as I accidentally mixed up my days and it was no problem. She is very nice and interesting....I am so jealous of all of her travels. You will feel really safe here.
The rooms are snug but cozy. The WiFi was great, as I was able to upload my pictures throughout my time in Berlin. I had such a lovely time in Berlin thanks to this apartment! Looks exactly like the pictures. I highly recommend that you stay here! You won't regret it.