Like Derek said, lots of good support and interest in the SG community. The government also (from my newbie eye) seems to be genuinely interested in promoting startups and creating a startup community.
On the flip side, unless your startup's market is geographically agnostic, I think you'll have to constantly remind yourself to look outside the SG market if you'll want any kind of real success, since the SG market is kinda small.
As for everything else (like talent pool), I'm not really sure yet as I've only been here for a few months :)