I stayed at the Nadia for 3 nights in December. The hotel had the best location- 1 minute from Western Kerk, between Jordaan & Dam Square and walking distance from the station.
The staff were the friendliest I've met in Europe and were always available to answer questions and good advice.
Although the room was small, it was perfectly clean and warm. Try getting one of the balcony rooms.
I had a great experience at the hotel & would highly recommend it.