Carolina was very easy to communicate with (even though we never met her!), and the apartment was exactly as pictured. Plenty of supplies in the kitchen and bathroom, a comfortable mattress, and couches for lounging. We were a bit worried before we arrived that it would be too hot in the apartment (since highs were in the mid-30s/mid-90s when we were there, and there's no air-conditioning), but the apartment stayed pleasantly cool despite the heat outside. Carolina wasn't in town for our stay, so we didn't get the generous welcome that other have described, but a friend of hers met us with the key and check-in was very easy. A lovely stay in Berlin!