Don't use the "preferred guest" floor
The highest floor in this hotel is the 9th floor, reserved for their "preferred guests". That floor is directly under the roof and it seems the entire floor vibrates to the tunes of the air handling system that must be mounted on top of that floor. I stayed in this property in FEB 2012 - I cannot tell if they had a mechanical failure or if this is the normal state of affairs, but one thing is sure: The entire floor is far too noisy. I asked to change rooms but none of the two rooms I inspected was really quiet. One room was simply noisier than the other. 
Overall, the rooms are very small, somewhat run-down and with an absolutely unattractive and dull "decor". I cannot say anything particularly positive about this hotel. 
In summary, I put a noise protector into my ears and made it through the night. I will definitely not come back to this property again.