We stayed at the Ibis Copenhagen Crown Hotel recently. The location of the hotel is great (about a 5 minute walk from Central Station). You can easily walk to Tivoli and all the tourist buses leave from the city center (5 min walk). The hotel was basic but had everything you need. It had a nice bathroom and a double bed. You could rent bikes from the hotel. It's in no way a fancy hotel, but its a comfortable place to stay and the staff are very friendly. There is a breakfast included, but don't expect too much (pastries and cereal mainly).

Good balance between price and quality : with 100 € (a low price for CPH) we got double room and breakfast too.
The room are not very new, but furniture and beds are new.
Breakfast was also a good surprise : on a rooftop overlooking CPH with an medium choice of sweet and salted things.
Position is very good, only five minutes to central station, or Tivoli and ten minutes to the Stroget (the pedestrian street near the Radhuset).
The only not so good thing was the bathroom : not too much clean and old. But for this price is a miracle having a personal bathroom in Copenhagen …. ;-))

I stayed at the Crown from 5-10-06 to 5-15-06. Service was adequate and polite. Desk staff were mostly helpful. Some shifts more than others.
Room was comfortable and quiet. Good location to train station and other attractions.
Close to Rt 26 bus that went to most attractions.

Good value for the money.
I would stay here again.