It depends on your budget really. Anywhere on lower Queen Street or thereabouts would be handy to Viaduct and Commercial Bay area restaurants and ferries. Movenpick is very nice, the rooms are quite small but modern and clean, and some rooms and the restaurant have great views of the harbour. If on more of a budget, the Quest on Queen serviced apartments are very good value in a great location. I’ve stayed at both and recommend. I’ve also stayed at Fable Queen Street (luxury!) and City Life Queen Street which is further up the hill (mid-range).