Parlour Burger has a great location. It's burgers however are unfortunately mediocre. This is backed up by the 45% like rate on urbanspoon. Unfortunately McDonald's has closed down nearby but if it was still open, I'd prefer the Maccas burger. You can always walk to Circular Quay Maccas though! I am not convinced by their main fare of the burger.
I tried the Chicken Quiona Burger with caesar dressing, above ($10). It was average and slightly dry. I prefer the Mc Chicken Burger for sure. The Beer Battered Onion Rings were not bad. They were crispy, big rings that weren't too oily.
The original morrison burger with chipotle mayo (below, $10) was also average. The meat was also slightly dry. The Duck Fat Chips were $6 and were average. Give this one a miss folks!