Javier was a fantastic host, he was there with his son to greet us and was extremely helpful. Ensuring we knew where the supermarket was and telling us about transport and parks etc.
The communication was good, he responded to any messages I sent almost immediately and even messaged me during our stay to let me know about a train strike.

The apartment was perfect. A nice size with everything we needed for our stay. The balcony is lovely and gets lots of sun during the daytime.
The tram stop is very close so is easy to get around the rest of Berlin.