At this moment in time, the 5 stars is meant to be a general rating that describes everything within the host's control. At the moment, while the station work at Barangaroo is being completed, I might give it a 3. But I'll get to that.

This apartment is fantastic. Great aesthetic, helpful furniture (lots of hooks and things - great storage), and it's bigger than it looks in the photos, especially the master. It has some gorgeous artwork, too.
Tom and Justin were amazing to deal with. Friendly and helpful, some great local tips and most importantly, great communication. Clear and prompt. I'd love to deal with them again. I wish everyone was like them.
Location-wise, the apartment is so central! Walk pretty much anywhere of note in the city, or hop a ferry for greater distances.
Parking for us was hard. Our car was just over 2.2m with things on the roof, so we didn't fit in any parking garages in the area. They're all 2.2, 2 or 1.9m. We had to re-ticket our street parking every 2 hours between the hours of 8am-10pm. There is a 4P street nearby, I discovered toward the end.
Barangaroo Station: we stayed here for 2 nights as a mini break on a road trip to QLD from VIC with 2 small children. That meant we wanted to get sleep and the kids to have naps and to not be out of the house all day. This did not work so well. The construction work is very loud and I made the mistake of assuming that it would stop at night. It does not. It gets quieter, but there is a machinery beeping sound. That. Goes. All. Night. If you're in the habit of sleeping with noise cancelling headphones or earplugs or something, you'd be fine.
In summary: I would definitely not stay here again while the construction work is going, but I most definitely would stay here after that!