I don't know Island Crest at all, but have house-sat in One Pacific Heights for a couple of months, so a few observations:
about 10 minutes walk from Sheung Wan MTR (or 30 minutes to Central, which I enjoyed in winter, but wouldn't want to be doing in summer), closer to the tram and plenty of buses.
It's a very "mixed" area - a few modern developments around, but also older buildings, and the dry seafood area at the bottom of the lane.
No parking, but accessible enough for furniture/ grocery delivery.
Quality of finish acceptable, but the kitchen isn't nearly as roomy as it looks at first glance - many of the built in cupboards are filled with pipes and other infrastructural bits. Included appliances are good quality.
It was too cold to use the pool when I was there, and the gym wasn't finished, but the friends who live there are enjoying those facilities.