EDIT: to clarify, esp. if you're not there (e.g. you're an Australian in Australia thinking of starting up in Singapore).
A lot of people have written long posts about it on Quora, so try a quick search there. The regulatory environment is changing somewhat this year, particularly regarding visas (apparently the EntrePass was abused by people buying themselves residency on the cheap and the government is cracking down).
Definitely not going to be a tech hub anytime soon though.
In one case, the guy was in Colombia when we made him an offer and sent him his flights, his EP was rejected when he was transferring in New York (because he didn't have a degree, so the government thought we were "overpaying" and asked us to explain), his appeal was approved just before he landed in Hong Kong, where he downloaded the Letter and showed it to border control in Singapore. Total time from offer to walking into the office: 36 hours. Good luck doing that in the US.