WOW what a great place this is! In a great location within a nice neighbourhood I visited Alexandra's place with a group of girlfriends (all mid 20's) and felt very safe. The apartment was really cool with some very stylish features making us feel very at home - it was a great place to hang out in and it was very convenient when we were out sight-seeing too. Alex was a lovely host; very friendly and helpful. I highly recommend this as a place to stay in Berlin and I would happily return there myself!