I stayed for 11 nights.
Pros: Very convenient location, within 10min walk from Green Square station. Super easy to get to the city by train or bus. Also supermarket nearby which opens till 11pm. The bedroom was clean, and communication with Polly was quick and easy. The coffee machine was a bonus!!
Cons: There was a safety lock attached to the window, and hence it cannot be opened wide enough to cool down the summer heat. A fan was provided but still can be a bit stuffy. The common kitchen can do with a little more cleaning. The bed was way too soft for me, but I understand this was my personal preference.
Despite the down sides, great experience overall. Will be back if I visit Sydney again.