spent 2 nights on 19th floor in December 2012 - given (without asking) free upgrade to better room. Very friendly and helpful staff. Room was very spacious, king size bed, large TV with good variety, WIFI, mini fridge, high ceiling giving very spacious feel to room. Great 25 metre outdoor pool. Conveniant underground access via hotel lift and underpass to Novena MRT (only 2 stops to Orchard MRT station). Airline pilots and crew stay here - so it must be OK! Only problem for us on 2nd night was a smoker in a room (breaking the rules!)which caused our room to stink out with cigarette smoke via the air conditioning. When I advised front desk, they could only send a staff member to spray deoderiser - we had to turn off air conditioning to stop smoke coming in and only turn it back on after smoking "offender" gone to bed after midnight. Despite hotel written policy to fine smoking offenders, they did not appear to attempt to find smoker to get it stopped. This was only issue which would have us think twice about returning to OASIA, otherwise highly recommended.