Ann is a very nice host and her apartment has all you need for a good stay in Berlin: comfortable beds, very well equipped kitchen, and fast WiFi 5 minutes from U/S Bahn and also 5 minutes from Tempelhofer Park.
And it's also kid friendly: we got a high chair and also a travel cot for our 1 year old.
I would definitely rent the same flat for our next visit in the city. Let's hope that it happens :)