I was in Amsterdam for a family reunion, altogether our group spent "16 room-nights" at the Radisson. The hotel is not cheap, but we managed to find a special offer to accommodate the whole family at the Radisson.
The location is very good, close to the Dam square and within reasonable walking distance to major museums. All public transport is 400-500 m away, however, so using a taxi is necessary if you can/will not walk.
The rooms were nice, not too small, well-equipped, beds very good, So all the basics of an excellent hotel were there. When hesitating about the rating, I weighed especially two areas:
The main problem was the breakfast space: it is absolutely too small for a hotel this size. In addition it is awkwardly arranged, with different levels and not very good logistics for the buffet. Sunday morning at nine was a chaos: people had to wait to get a table and the personnel barely coped with the clearing of tables and filling of plates. When the pressure grew untolerable, the lobby and bar were full of breakfast-eating guests.
Weekdays were easier, but the size and awkward shape of the room remained a problem. This prevented to me the rating as "excellent".
The stay was, however, made very enjoyable by the friendly and helpful staff. The lady at the front desk telephone was constantly busy, never hurried, always good-humoured and solved several little issues to us. Service at its best! Thus the rating will be "very good" but I would like to add a "plus".