Brilliant location, very close to several U-Bahn stops. Lots to see within a short walking distance too, and even more without the need of public transport if you enjoy walking like I do!
The building superintendent who showed us around is really friendly and helpful and gave us some tips to start our holiday. There is a market on the street outside a couple of times a week which was a nice bonus.
The apartment itself is great for a short stay, has pretty much everything you need. Cooking may be difficult with just a couple of hob rings and no oven, but it's so close to so many really wonderful places to eat that on a holiday that shouldn't really matter!
Matthias was very quick and reliable with his communication. Will definitely look at staying here again if it's available next time I'm in Berlin. Thanks!