The location of this apartment is brilliant for exploring Berlin as it is so central. The views from the balcony are also amazing. We predominantly used the AirB+B as a base but enjoyed mornings and evenings sat outside taking in the views.
Michael is very quick to reply to messages. When estimating your time of arrival be sure to consider how long it can take to get from the airport. We had a terrible time with passport control and a broken down train which delayed our arrival and no doubt inconvenienced Michael. I would therefore recommend messaging Michael once you're through passport control if arriving by air!