This is in an odd but convenient location. It's about 20 minute walk from Zoo train station, and only 5 minutes from KaDeWe department store and Kurfurstendamm, the main drag on the western side. It's in a residential district-so you feel like you are staying with friends. The rooms are really nice, with comfy down comforters and pillows (i guess standard for German accomodations) and modern clean bathrooms. The best thing is the breakfast. It runs until 11am, and there is a wide selection of cold cuts, cheeses, cereals, yogurt, juices, and more. The breakfast room is big and airy, with an array of newspapers. In the summer, there is a courtyard garden to sit in. There was always a fresh supply of food as they replenish so quickly. The staff at the reception is also very helpful.
The only downside is, you are not right in the middle of action. At night, you would have to walk back home. Howeverm there are supermarkets, cafes and bakeries all around, just like any nice residential neighbourhood. As two females traveling, we at no time felt unsafe. We actually enjoyed being away from the action, the peace and quiet after a full day's adventures.
Their website: www.arco-hotel.de