Mel was a dream hostess - very responsive, responsible and friendly. We met her personally and she went through the details with us. We had a car so easy to miss the house at first but no trouble after. Convenient to city, eastern suburbs and Airport. If you buy the Opal card, buses are convenient too - truly great location!
Wifi - signal is weakest/gone in Bedroom 3, but didn't bother me as I had data.
Also through no fault of Mel, the Caltex beside the house is under reno till June 3 so can be a bit noisy from as early as 7am. If your stay includes the weekend, it was noisier on Sat night from the bar beside but again.. didn't bother me. The group before us didn't take the bins out so was unfortunate there but Mel did her best squishing them down.
About the stairs - yes a little steep but you're on holiday so slow down and you won't have any trouble. Might bother you more if you have really bad knees. We were travelling with a baby (m traveling with a group. Thanks Mel!