Stayed for a week for business reasons in Double Bay. Close to every nice cafe/restaurant Double Bay has to offer, and delivery drivers don't get mad for driving 2 minutes because I'm lazy and it's cold outside.
The building itself is a little dated, some noisy pipes and creaky floors - but I can't fault the rooms, facilities, staff or the location.
Also, if you are feeling bored or adventurous, play Sydney Driver Bingo - you won't go an hour without seeing a near miss, car parked on the side of the road because of a poorly timed appointment, arguments at roundabouts, or an actual accident - fun times.