I went over with another female colleague/friend for 2 nights. On arrival we got a bit lost but then found it ok. We arrived around 2pm so put our luggage in a holding room where they give you a ticket for each item and then had a walk around until check in time at 3pm.
We asked for a twin room with a canal view. The room was small but fine as we were only there 2 nights. The 2 beds were together which were a little too close. You get complimentry soap, shampoo & shower gel - the soap is lovely.
The reception staff were always friendly and courteous and the sweets in the glass jar on reception were very nice.
We found the local bars and restaurants very good. The food was great at Luxembourg (turn right out of entrance) and there was a band on. For our other meals we ate either in town or in Leidseplein.
After a canal tour we walked back to the hotel from Centraal Station and found a Red Light Area at the bottom of Spuistraat which was a bit of a surprise as we expected them all to be in the one area.
When we checked out at 11am they let us use the holding room for our luggage so we didn't have to carry it around all day. We then found a great market in De Pijp passed the Rijk Museum called Albert Cuyp market. It was full of locals and full of bargains.
All in all the NH City Centre is a very nice hotel in a great location (safe enough for 2 girls to walk to at night). We would definately go to this hotel again.