My stay at Jas' was ok, unfortunately my experience wasn't as good as others or perhaps I have higher standards.
The apartment wasn't as clean or as in as good repair as I expected, wallpaper flaking off in areas, hair in the shower, greasy range hood with no cover, carpet was bubbling in areas, heavily stained chairs etc and just general quality of furniture and fit out wasn't great. The bedding and towels could have been nicer (probably kmart and in need of replacement).
However for me the biggest issue was the noise, the apartment is a few blocks up from southern cross station and a few floors above the train and tram line which runs from 5am-1am, it made sleeping very difficult even with loud white noise.
Would be fine for a weekend rental but wouldn't recommend for business travellers. I did not sleep well with the constant noise every few mins virtually all night.
On a plus note, Jas was great communication wise, location central and check in was simple.