We booked three rooms - 1 x one bed executive and 2 x one bed suites for a few nights attending a conference at Darling Harbour. The location is great, a few steps to Darling Harbour, Chinatown and the Spanish area with the monorail also very close by.
The hotel is on the lower floors of a larger apartment block and has good facilities, pool, sauna, gym ect - all clean and in good condition. My executive on the six floor front corner had a nice but narrow view of the Chinese Gardens, my friends had slightly smaller suites facing Liverpool Street on the 3rd and 5th floors which seemed a little more noise effected than mine. It is nice to have a balcony which is large enough for a table and a couple of chairs if you don;t mind the traffic. This is very central Sydney so noise will always be an issue.
All our suites were spacious, well furnished and clean, the bathrooms are very small in relation to the overall size of the suite with an adequate shower over a bath which itself is too small for anyone taller than 5 foot. The beds and bedding were also very comfortable. The lack of a safe large enough for a small laptop computer is dissapointing for a business style hotel. Breakfast was fine but did not otherwise eat at the hotel as there are so many option around the immediate area.
The front desk staff were very helpful and responsive and I would recommend this as a great alternative to the conference hotels in Darling Harbour especially if you like a little more space.

Stayed here on a business trip in a suite which was only a few dollars more a night than the normal room, so check it out when you go to book. The hotel is 5 minute walk to Darling Harbour and your are right beside Chinatown. The room was very spacious, and comfortable. Since it was in the city, there was much of a view. Overall, a very comfortable stay. I would recommend.

I've been staying at the Radisson now for a number of years and generally find it pretty good,the location is unbeatable,5 minutes walk from Darling Harbour and Chinatown,very close to Pubs/clubs etc ,10 minutes walk to the centre of Sydneys shopping area and 20 min walk to the Rocks where the Opera House and Bridge are.
After reading previous reviews i can imagine that if you are in some "lower" floors there could be a noise problem due to traffic and the monorail but i have always been lucky enough to be given a room higher up.
On this trip i checked in late after a flight from Brisbane and the staff were very friendly,there was no one else around and the whole process took no time at all
My room on the 7th floor did smell a bit "musty" on entering as other reviewers have experienced but in general the room and bathroom were clean and well equipped so no complaints there really.I used the pool,sauna and gym in the hotel which is good although i would suggest that the gym is far too small for the size of the hotel (5 people max at a time),the small bar area is a nice place to meet and have a quiet drink before heading out but i didn't eat at all in the hotel,why would you when Sydney has a fantastic array of eateries !
All in all the hotel isn't cheap but you are stying in the middle of a big city and in a great location,no major complaints though and i'll probably stay there next year.
Finally my tip for Sydney if you haven't been there before is to walk to the Rocks and take a 20 min $12 ferry ride to Manley Beach,the views of the Bridge and Opera House are fantastic out and back and Manley is a great beach to visit for the day.

Worst nights sleep ever
How this hotel is anywhere near the top of the ratings suprises me its musty rooms small lobby and noisy location is a must avoid
We were booked into 2nd floor room in touching distance of passing monorail which when we comented about told it would finish 9pm did not stop till 1am
Disco booming beat music till 5am windows not double glazed so heard it all along with constant shouting people being sick and swearing....if you get this hotel on wotif special dont accet a front room or be prepared to boogie all night
As for the room musty smell you got used to by morning
sorry to be harsh but this is how i found it..