Two of us had planned to stay here over a weekend ahead of a work event during the week. I had to cancel my trip on the Friday whilst my colleague still went. Anna had no problem with this and facilitated the change in plans.

The following therefore is the review from my colleague:
Large flat, clean and easy to find. Both bedrooms could easily sleep three people.
Peter let me in and was very helpful. I was early and the cleaner was still there but there was no problem about dropping my bags off.
Location is good - it's quiet but close to transport and places to eat, drink etc. Also, there is a section of the Berlin Wall really close by that's definitely worth walking to.