FANTASTIC! Highly recommended! I was visiting Berlin with my 17-year old cousin who had never been overseas before. Of all of the touristy things we had done over 5 days, his favorite part of Berlin was Mario's flat! All of the amenities were outstanding, it's in a super good location to many of the tourist attractions and Mario's instructions were very clear and concise. If there was a way to give 10 stars, I would have! Totally would visit again.