We stayed at the Mirror Apartment for a long weekend visit to the Christmas markets, and it was perfect for us. The place is huge. 5 bedrooms with comfy beds, large living/dining room, very well equipped kitchen and 2 large bathrooms. Everything was spotlessly clean and the place is quiet given the city location. The central station is a 30 minute walk and there's an S-Bahn/U-Bahn station 15 minutes away on foot. Not a whole lot in the neighbourhood as far as restaurants and cafés go - it's very residential - but getting around Berlin is so easy, and you're not far from the action. There's a very well stocked Edeka supermarket about 10 minutes away if you plan to self-cater. Highly recommend the apartment for larger families and groups.