I travel a lot but I can safely say that Ovolo might be the best hotel I've ever stayed with, at least in this price range. Everything from the big stuff (location, restaurant, spacing and design of the rooms) to the smaller things (music, service, complimentary mini-bar, Alexa in the rooms, access to local gym) is very well thought through and executed.
The people who work there clearly enjoy doing so, which really comes through! I stayed for a week while at a big conference and had a few colleagues over to visit for drinks. They all agreed they should have stayed at Ovolo instead of at the (more expensive) major hotels a few minutes closer to Darling Harbour. I will come back here and strongly recommend it to everyone going to Sydney!