A very cozy, ikea type hotel where red dominates the rooms of the right size with clean and contemporary style sinks. You can connect to the internet with wifi sitting on one of the sofas in the entrance lobby. It's very well located (near Brandenburg Gate) and Naturkundemuseum is the metro stop.
Gaestehaus Berlin Mitte Hotel is about 250 meters from recognized stores, 600 meters from the main railway station and 1.5 km from the Brandenburg Gate. Rooms have satellite TV, wireless Internet, safe and a private bathroom. The attention is commendable and the atmosphere is very nice.
The Amadeus Hostel Berlin has spacious rooms for groups and solo travelers. Showers and toilets are located on each floor. It's an excellent base for budget travelers and is next to Voltastraße metro station coming to the Alexanderplatz square and the vibrant area of Mitte in just 6 minutes away.