We stayed at The Mantra on Kent Street for an extended stay of 9 nights in Sydney and were thrilled with our choice. Our room was spacious, with separate bedroom and living area, and included a small kitchen and dining area. The kitchen was a welcome bonus for having breakfast each morning or a late night snack that we could whip up on our own. The bed was very comfortable and the closet large enough for all of our stuff.
The location of this hotel cannot be beat, as you are less than a 5 minute walk to the fabulous restaurants of Darling Harbour. Associates at the front desk were very helpful in providing information that we needed, assisting with reservations, etc.
The hotel could use a bellman to assist with luggage and taxi's, as most are there for an extended stay and have plenty of things to carry.
Cleaning service came each day and left the room spotless. In-suite laundry came in SO handy towards the end of our stay, and when we needed more detergent, it wasn't a problem.
I'd highly recommend this condo/hotel for long-term stays in Sydney.