We stayed here for the Marathon and it was perfect. We loved the location, it was right next to Stadtmite (U6 and U2) so public transportation was a breeze. Close by, there was a dm (CVS without the pharmacy), pharmacies, Mall of Berlin, bakeries, and coffee shops.
The place had everything we needed, especially in the kitchen: microwave, hot plate, kettle, fridge.
The only thing for couples to note is that the bedding is 3 single beds that can be pushed together so there will be a mattress “crack”.
Highly recommend staying here if you are exploring Berlin.