Great location, Gary was very helpful. South Yarra station is just a few minutes walk. This gives you speedy access to everywhere. The nearest Woolworths on Chapel is a bit of a lug back with full shopping bags but if you go there via a kids play area and Alexandra Ave it's a shorter walk. I found myself shopping in Coles on Elizabeth St (Where a regular coffee is just 80 cents!) then the walk back is only from South Yarra Station.
If you're not used to Oz food prices it's expensive. Coles are a bit cheaper. Don't just pick up stuff without looking.
St Kilda is easy and quick to access - Tram 58 from South Yarra back to Toorak Rd change to 16 (or 3a an extra option on Saturdays)
I found the apartment stayed cool during the day without using the aircon - I left windows open all night. My stay was in March. The bin men are early and noisy - same the world over.
Assuming the insulation is great everywhere nowadays I couldn't understand how come the rain was so audible. I found this very pleasant though, great at night.
The walk from the apartment through the botanical gardens then along the Yarra to CBD is a great way to start the day. The Botanical Gardens café and Flinders St both have free wifi if you're avoiding Oz data charges which are seriously exorbitant. Using data could easily run up to hundreds of dollars a day.
Generally a week or month Myki card is essential for public transport. First stop after arriving was the nearest Seven-11 to get my card.
City Public Transport will get you as far as the ranges at Macedon and Belgrave (Dandenong) but you may need to pay extra to go to zone 3.
I wouldn't count on being able to use the parking on site. Street parking is mostly 2 hours outside the apartment. Public Transport is quicker than driving in most cases, as locals will tell you South Yarra means using Punt Road, and no one likes getting stuck in the traffic on Punt Road.
Prahran Market is close and has some fine food and is worth a look. Vic Market for souvenirs and a tourist stop. The most authentic market for me was Preston Market. I would have eaten there every day. But they are shut Monday and Tuesday.
In terms of Parks I found Fitzroy Park the most pleasant after the Botanical Gardens. It's only a few minutes walk from Flinders.
Had a great stay.