Stayed 3 nights in Academy Hotel Berlin and this gem has made my stay more memorable. Although it is not located within Berlin's Central, the major attractions are accessible via U Bahn or S Bahn. The nearest U Bahn station located is about 10 minutes walk and Academy Hotel is nestled within a quiet residential neighborhood.
The reception staff is friendly and helpful and within the hotel, you noticed the little details that they have made to make it more cosy for guests, such as free chocolates at the reception. Within the rooms, it's nice and cosy with amenities such as mini fridge, hair dryer, hand soap. Not bad for a budget hotel by European standards. It definitely felt at home instead of a hotel in Academy.
If you don't mind the distance and bit of walking from the U Bahn station, I would recommend Academy Hotel to those who are on budget but looking for a nice cosy stay in Berlin. I would give a 8 out of 10 to Academy.