My partner and I stayed in a one bedroom suite ocean view room for two nights. The room was gorgeous - we had checked out similar rooms at the other hotels in Darwin and Sky City was superior to all. And at a comparatively good price too (we are talking Darwin after all!). It was much cheaper than nearby competition, in terms of location and having a suite.
The spa was fabulous, the views stunning and the decor as I said above gorgeous and comfortable. I never bother with overpriced mini-bars, but the free teas, coffees and hot chocolates were varied, good brands and plentiful. The customer service was good - although we called for a hand with our bags when we were checking out and they never showed up! But the porters were more than helpful and apologetic when we saw them on the way out. I think it was actually the receptionist hadn't passed on the message!
Anyway, a fantastic stay and I highly recommend Skycity.