The host, Tom, was very responsive, friendly and had very good recommendations, especially for coffee shops! Go check them all out, its good stuff!
The flat is very cosy, clean, modern and has a nice balcony. On top of that, the apartment is very conveniently located, since there are no bars right next to it, its very quite. Still it only takes 1 min walk to the beach and approx 5 min walk to the center of manly.
I had a very nice stay at Tom's place and will stay there again if I get the chance to go back to Manly beach.