We booked a category 3 apartment for a week in Berlin. Unfortunately the first apartment we were assigned didn’t have a bathtub as advertised. The apartment was hot and stuffy because there was no air conditioning. There were no windows, just two glass doors that led to a balcony and staircase within the apartment complex. Leaving the doors open made us feel uneasy. We requested to change rooms and they were able to accommodate our request two nights later. The communication and service was excellent, and the apartments were clean and stylish and had good security measures to enter the complex. However, for the price, I wish we had booked at a luxury hotel with air conditioning since Berlin was experiencing a heat wave. Both apartments only had heavy, light blocking curtains, which meant that if we wanted privacy within the courtyard we had to sit in a dark room and it was hard to get a breeze.