This is a very good deal, and I would highly recommend staying at this place if you want to explore Sydney (even though I have one very minor reservation - see the paragraph below)! It's in a prime location, with great amenities. The price is a steal given what you get out of this deal. Specifically, the host is very responsive and accommodating - we arrived in Sydney early (8 AM-ish), but she was able to get the unit ready for our arrival that early. She also bought some baguette for us at no extra cost upon our arrival. She also checked in to make sure we were satisfied with our lodgings during the middle of our stay (we stayed at her place for a week). She also has a very nice folder with recommendations of things to do in Sydney - both in the local neighborhood (Chippendale) and Sydney at large.
My only reservation: the space may be smaller than you would expect based on the photos. I thought I would have more space (perhaps 10 extra square meters of space) based on the photos I saw. Even though the size was disappointing at first, overall it was a very minor setback. I would still recommend staying at Lena's place despite this setback.