I stayed for 2 weeks after arriving from New Zealand. The location is SO convenient (literally across the road from Southern Cross station and right in front of a tram stop), and the key collection place was really handy, only a few doors down. The key collection place also offers luggage storage which is really useful if you have an early/late flight, much cheaper than storing at Southern Cross. The unit itself has everything you need, the kitchen is fully equipped with lots of pots and pans, great washer and dryer (although the dryer was a little noisy), full size fridge and freezer, and even a vacuum cleaner! The only thing I didn't love was that the air fresheners were really overpowering but I just put them outside and it was fine :) If you are someone who needs a quiet, dark room to sleep, this is probably not the place for you as the blinds don't block out much light, and it is right across from a shopping centre. There's also general foot/vehicle traffic noise below, but again, it's the city, so it's to be expected.
All in all, would absolutely stay again, thank you so much!